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[Ends 10 AM JST, June 25 (Thu): Lottery Sale] 13 carefully selected items, including Tashmarine and Flores Diamond
June Birthstones: Moonstone, Pearl, Alexandrite
Mini Bottle Keychain Filled with Natural Stones (Choose from 11 Colors)
KARATZ Books
Custom-made jewelry with stones

NEWS

2026/06/29

【2k540 AKI-OKA ARTISAN】（JR秋葉原御徒町間高架下）ポップアップストアのお知らせ [7/30(木)～8/2(日)]

2026/06/29

【お知らせ】TVアニメ「Dr.STONE」コラボアイテム 一部商品の発送遅延について

2026/06/28

【7/3(金)10時am〆：抽選販売②】フォスフォフィライトや非加熱カラーチェンジサファイア、新作パライバジュエリーなど厳選12点

2026/06/28

【7/3(金)10時am〆：抽選販売①】トップクオリティのベニトアイトやネプチュナイトなど合計13点　

[Lottery Sale: Applications close at 10:00 AM on Thursday, June 25th]

coming soon [Listed as 32501945] Green Diamond 0.129ct Loose (FANCY LIGHT YELLOW GREEN, VS2)

[Listed as 32501945] Green Diamond 0.129ct Loose (FANCY LIGHT YELLOW GREEN, VS2) Sale price¥98,000
coming soon [Listed on 12563344] Unheated Kashmir Sapphire 0.160ct Loose Stone

[Listed on 12563344] Unheated Kashmir Sapphire 0.160ct Loose Stone Sale price¥98,000
coming soon 【12563379 posted】Sri Lankan unheated color change sapphire 1.140ct loose stone

【12563379 posted】Sri Lankan unheated color change sapphire 1.140ct loose stone Sale price¥258,000
coming soon [Listed as 12563378] Alexandrite 0.320ct Loose Stone

[Listed as 12563378] Alexandrite 0.320ct Loose Stone Sale price¥128,000
coming soon Tanzania color change spinel 0.319ct loose stone

Tanzania color change spinel 0.319ct loose stone Sale price¥29,800
coming soon 【12562403掲載】ブラジル産バイカラーパライバトルマリン 0.190ctルース

[Listed as 12562403] Brazilian Bi-Color Paraiba Tourmaline 0.190ct Loose Stone Sale price¥298,000
coming soon [12562255 listed] American Neptunite 0.162ct Loose Gemstone

[12562255 listed] American Neptunite 0.162ct Loose Gemstone Sale price¥45,800
coming soon 【22602591掲載】Pt950 ブラジル産パライバトルマリン 0.043ct リング

[Listed as 22602591] Pt950 Paraiba Tourmaline from Brazil 0.043ct Ring Sale price¥98,000
coming soon [Listed on 12563303] Unheated Kashmir Sapphire 0.110ct Loose GIA

[Listed on 12563303] Unheated Kashmir Sapphire 0.110ct Loose GIA Sale price¥79,800
coming soon Lottery sale: Madagascar Sphene 2.323ct loose stone with鑑別書

Lottery sale: Madagascar Sphene 2.323ct loose stone with鑑別書 Sale price¥98,000
coming soon [12563396 Posted] Brazilian Rutile (Single Crystal) 1.474ct Loose Gemstone

[12563396 Posted] Brazilian Rutile (Single Crystal) 1.474ct Loose Gemstone Sale price¥39,800
coming soon [Posted 12562257] American Neptunite 0.374ct Loose Gemstone

[Posted 12562257] American Neptunite 0.374ct Loose Gemstone Sale price¥79,800
coming soon [Listed as 12562560] Unheated Montana Sapphire (Yogo Mine) 0.159ct Loose Stone

[Listed as 12562560] Unheated Montana Sapphire (Yogo Mine) 0.159ct Loose Stone Sale price¥98,000
Sold out アメリカ産ベニトアイト 0.262ctルース

U.S. Benitoite 0.262ct Loose Gemstone with Certificate
coming soon ベニトアイト 0.129ctルース

Benitoite from the USA, 3.1mm/0.129ct loose stone, with a certificate of authenticity. Sale price¥59,800
coming soon US Benitoite 0.148ct Loose Stone (Emerald Cut) with Gem Identification Report

US Benitoite 0.148ct Loose Stone (Emerald Cut) with Gem Identification Report Sale price¥69,800
coming soon [12558084 posted] Benitoite 0.190ct Loose, with identification report, Made in America Benitoite 0.158ct Loose, with identification report Benitoite 0.190ct Loose, with identification report

[12558084 posted] Benitoite 0.190ct Loose, with identification report, Made in America Benitoite 0.158ct Loose, with identification report Benitoite 0.190ct Loose, with identification report Sale price¥118,000
coming soon 【12562748掲載】アメリカ産ネプチュナイト 0.859ctルース

【Lottery Sale 0428_2_05】American Neptunite 0.859ct Loose Gemstone with Certificate Sale price¥128,000
coming soon [12562439] Unheated Pigeon Blood Ruby 0.440ct Loose

[12562439] Unheated Pigeon Blood Ruby 0.440ct Loose Sale price¥79,800
coming soon 【22602618掲載】Pt900 ブラックダイヤモンド 1ct リング

[Published 22602618] Pt900 Black Diamond 1ct Ring Sale price¥148,000
coming soon 【22602589掲載】K18/Pt950 ブラジル産パライバトルマリン 0.064ct ペンダントトップ（ネックレストップ）

[22602589 Listing] K18/Pt950 Brazilian Paraiba Tourmaline 0.064ct Pendant Top Sale price¥128,000
coming soon 【22602592掲載】K18/Pt950 ブラジル産パライバトルマリン 0.045ct リング

[22602592] K18/Pt950 Brazilian Paraiba Tourmaline 0.045ct Ring Sale price¥128,000
coming soon コロンビア産ノンオイルエメラルド 0.240ctルース

Colombian non-oiled emerald 0.240ct loose stone Sale price¥458,000
coming soon コロンビア産ノンオイルエメラルド 0.350ctルース

0.350ct Loose Colombian Non-Oil Emerald Sale price¥398,000
See Lottery Sale List

New & Updated: 6/26 (Fri)

Gemstone Identification Guidebook (Not available for purchase separately; gift for purchases of 3,000 yen or more)

Gemstone Identification Guidebook (Not available for purchase separately; gift for purchases of 3,000 yen or more) Sale price¥0
[Restock on June 27th at 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1: The Big Five Gems

[Restock on June 27th at 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1: The Big Five Gems Sale price¥660
[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥6,980
coming soon [On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥11,000
coming soon [On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥22,000
coming soon [On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥33,000
coming soon [Awaiting appraisal] "Sourced in Hong Kong - Limited 8 stones" Afghanistan Green Hauyne Loose Stone [Multiple purchase discount available]

[Awaiting appraisal] "Sourced in Hong Kong - Limited 8 stones" Afghanistan Green Hauyne Loose Stone [Multiple purchase discount available] Sale price¥6,980
coming soon [On Sale June 6th at 10 PM JST] "Limited 13 Stones" Fluorite Gacha including flawed Koshu cut gemstones "Bulk Purchase Discount Available"

[On Sale June 6th at 10 PM JST] "Limited 13 Stones" Fluorite Gacha including flawed Koshu cut gemstones "Bulk Purchase Discount Available" Sale price¥3,980
coming soon [6/ 10 PM JST Release] 《Limited to 11 Stones》Bicolor Gemstone Gacha featuring Paraiba Tourmaline and Euclase 《Bulk Purchase Discount Available》

[6/ 10 PM JST Release] 《Limited to 11 Stones》Bicolor Gemstone Gacha featuring Paraiba Tourmaline and Euclase 《Bulk Purchase Discount Available》 Sale price¥5,980
coming soon [Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available)

[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available) Sale price¥14,800
coming soon [On Sale June 6th at 10 PM JST] "Limited 13 Stones" Fluorite Gacha including flawed Koshu cut gemstones "Bulk Purchase Discount Available"

[On Sale June 6th at 10 PM JST] "Limited 13 Stones" Fluorite Gacha including flawed Koshu cut gemstones "Bulk Purchase Discount Available" Sale price¥4,980
coming soon [On sale March 7th at 10 PM] [Limited Stock] World Heritage Sigiriya Gemstone Painting & 3+ Sri Lankan Gemstones Support Set (Total Value Approximately ¥50,000) Purchased Directly from a Sri Lankan Workshop [Multiple Purchase Discounts Available]

[On sale March 7th at 10 PM] [Limited Stock] World Heritage Sigiriya Gemstone Painting & 3+ Sri Lankan Gemstones Support Set (Total Value Approximately ¥50,000) Purchased Directly from a Sri Lankan Workshop [Multiple Purchase Discounts Available] Sale price¥30,000
coming soon [Sale 6/] 10:00 PM - Limited 11 Stones - Sri Lankan Pink Sapphire (Emerald Cut) Average 0.73ct (Multiple Purchase Discount Available)

[Sale 6/] 10:00 PM - Limited 11 Stones - Sri Lankan Pink Sapphire (Emerald Cut) Average 0.73ct (Multiple Purchase Discount Available) Sale price¥5,980
coming soon [On sale May 10th, 10 PM JST] 6 Limited Pieces - Brazilian Mica in Rose Quartz (One stone), Multiple Purchase Discount Available

[On sale May 10th, 10 PM JST] 6 Limited Pieces - Brazilian Mica in Rose Quartz (One stone), Multiple Purchase Discount Available Sale price¥2,980
coming soon [6/ 10 PM JST release] 《Limited 10 Stones》 Iolite Gacha featuring Koshu-Kiseki-Kiriko plusthree 《Bulk purchase discount available》

[6/ 10 PM JST release] 《Limited 10 Stones》 Iolite Gacha featuring Koshu-Kiseki-Kiriko plusthree 《Bulk purchase discount available》 Sale price¥3,980
[On Sale June 28th, 10 PM] Brazilian Paraiba Tourmaline Gacha with Sorting Report (CuO: 2.1%, MnO: 2.2%) - Limited to 18 Stones! (Multiple Purchase Discount Available)

[On Sale June 28th, 10 PM] Brazilian Paraiba Tourmaline Gacha with Sorting Report (CuO: 2.1%, MnO: 2.2%) - Limited to 18 Stones! (Multiple Purchase Discount Available) Sale price¥9,800
Limited to 10 stones: Brazilian Bicolor Tourmaline (Baguette Cut) - 1 loose stone. Discounts available for multiple purchases.

Limited to 10 stones: Brazilian Bicolor Tourmaline (Baguette Cut) - 1 loose stone. Discounts available for multiple purchases. Sale price¥29,800
[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available]

[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available] Sale price¥5,980
[On Sale June 28th at 10 PM] Limited to 10 Stones: Brazilian Mint-Color Montebrasite (Princess Cut approx. 3.5mm) - 1 Loose Stone (Volume Discount Available)

[On Sale June 28th at 10 PM] Limited to 10 Stones: Brazilian Mint-Color Montebrasite (Princess Cut approx. 3.5mm) - 1 Loose Stone (Volume Discount Available) Sale price¥3,980
[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available)

[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available) Sale price¥7,980
[On Sale June 27, 10 PM JST] "Limited to 10 Stones" Rough Stone Gacha including Paraiba Tourmaline (CuO: 1.7%+ content) and Benitoite (with a bonus Oregon Sunstone) "Multiple Purchase Discount Available"

[On Sale June 27, 10 PM JST] "Limited to 10 Stones" Rough Stone Gacha including Paraiba Tourmaline (CuO: 1.7%+ content) and Benitoite (with a bonus Oregon Sunstone) "Multiple Purchase Discount Available" Sale price¥2,980
Kyanite from Nepal, 1 loose stone (indigo blue color, 4 x 6 mm, emerald cut) {Multiple purchase discount available}

Kyanite from Nepal, 1 loose stone (indigo blue color, 4 x 6 mm, emerald cut) {Multiple purchase discount available} Sale price¥2,980
[Featured in 12562265] Brazilian Lazulite 0.061ct Loose Stone

[Featured in 12562265] Brazilian Lazulite 0.061ct Loose Stone Sale price¥45,800
ブラジル産パライバトルマリン 0.360ctルース GIA鑑別書

Brazilian Paraiba Tourmaline 0.360ct Loose GIA Sale price¥298,000
ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 0.344ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 0.344ct Loose Stone Sale price¥9,800
coming soon 【12563389掲載】ブラジル産ダイオプテーズ 0.956ctルース

[Featured in 12563389] Brazilian Dioptase Loose Stone 0.956ct Sale price¥23,800
coming soon [Posted as 12563391] Tanzanian Pink Spinel 0.246ct Loose Gemstone

[Posted as 12563391] Tanzanian Pink Spinel 0.246ct Loose Gemstone Sale price¥35,800
Pt950 アレキサンドライト 0.08ct・ダイヤモンド0.25ctリング 鑑別カード

[Published 22602658] [Karafuri] Pt950 Alexandrite 0.08ct Ring Sale price¥98,000
Pt900 ブルーサファイア 0.43ct・ダイヤモンド0.44ctリング 鑑別書

[Item ID: 22602630] [Karafuri] Pt900 Blue Sapphire 0.43ct Ring Sale price¥98,000
K18 ペリステライト 0.66ct・ダイヤモンドペンダントトップ（ネックレストップ） 鑑別書

[22602614 Listed] [Calafli] K18 Peristerite 0.66ct Pendant Top (Necklace Top) Sale price¥29,800
coming soon K18WG ルビー 0.94ct・ダイヤモンド0.66ctペンダントトップ（ネックレストップ）　 鑑別書

[Published on 22602611] [Carafur] K18WG Ruby 0.94ct Pendant Top (Necklace Top) Sale price¥158,000
coming soon K18 合成オレンジサファイア リング 鑑別書

[Posted on 22602644] [Calafri] K18 Synthetic Sapphire Ring Sale price¥45,800
coming soon Pt900 ルビー 0.60ct・ダイヤモンド0.24ctリング 鑑別書

[Listed on 22602645] [Colorful] Pt900 Ruby 0.6ct Ring Sale price¥98,000
K18 ブルーサファイア・ダイヤモンドリング 鑑別書

[On sale June 27, 10 PM] Colorful K18 Blue Sapphire and Diamond Ring with Certificate Sale price¥128,000
K18 ブルーサファイア 1.89ct・ダイヤモンド0.74ctリング 鑑別書

[On sale June 27th at 10 PM] [Colorflee] K18 Blue Sapphire 1.89ct / Diamond 0.74ct Ring with Appraisal Report Sale price¥298,000
Pt900グロッシュラーガーネット 1.38ct・ダイヤモンド0.13ctリング 鑑別書

[On sale 6/27 10 PM] [Colorful] Pt900 Grossular Garnet 1.38ct and Diamond 0.13ct Ring with Appraisal Sale price¥98,000
【Sale starts 10PM on June 27th】《Limited 8 Stones》Myanmar Black Spinel (B Grade)《Multiple Purchase Discount Available》

【Sale starts 10PM on June 27th】《Limited 8 Stones》Myanmar Black Spinel (B Grade)《Multiple Purchase Discount Available》 Sale price¥1,980
[Sale on June 27th at 10 PM] Limited to 2 Stones: Myanmar Red Spinel (Pear Shape approx. 4x3mm) - Multi-Purchase Discount Available

[Sale on June 27th at 10 PM] Limited to 2 Stones: Myanmar Red Spinel (Pear Shape approx. 4x3mm) - Multi-Purchase Discount Available Sale price¥9,800
[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available

[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available Sale price¥9,800
[On sale June 27th at 10 PM] Limited to 10 Stones: Sri Lankan Chrysoberyl (Cut by Mr. Sanje) Gacha (Includes Parrot Color, Canary Yellow) [Multiple Purchase Discount Available]

[On sale June 27th at 10 PM] Limited to 10 Stones: Sri Lankan Chrysoberyl (Cut by Mr. Sanje) Gacha (Includes Parrot Color, Canary Yellow) [Multiple Purchase Discount Available] Sale price¥3,980
Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases

Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases Sale price¥4,980
マダガスカル産パパラチアサファイア 3.4mm/0.252ctルース 中宝鑑

【On Sale June 27, 10 PM】Madagascar Padparadscha Sapphire 3.4mm/0.252ct Loose Stone - Central Gem Laboratory Sale price¥45,800
マダガスカル産パパラチアサファイア 0.186ctルース 中宝鑑

[On Sale June 27th, 10 PM] Madagascar Padparadscha Sapphire 0.186ct Loose Stone - Central Gemological Laboratory Sale price¥25,800
スリランカ産アイスブルーサファイア 1.134ctルース 鑑別書

[Listing No. 12563411] Blue Sapphire 1.134ct Loose Gemstone Sale price¥45,800
ジンバブエ産ユークレース 0.054ctルース 鑑別書

[Posted 12563373] Zimbabwean Euclase 0.054ct Loose Gemstone Sale price¥14,800
アフガニスタン産グリーンアウイナイト 0.142ctルース

[Listed on 12563409] Afghani Green Hauynite 0.142ct Loose Sale price¥39,800
アフガニスタン産グリーンアウイナイト 0.135ctルース 鑑別書

[Posted as 12563408] Green Hauyne from Afghanistan 0.135ct Loose Sale price¥35,800
インターナリーフローレスダイヤモンド 0.217ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA Sale price¥88,000
Show more

List of new arrivals

ブラジル産ユークレース 0.289ctルース

Brazilian Euclase 0.289ct loose stone Sale price¥12,800
ブラジル産ユークレース 0.263ctルース

Brazilian Euclase 0.263ct Loose Stone (Colorless Euclase) Sale price¥9,800
ブラジル産ユークレース 0.695ctルース

Brazilian Euclase 0.695ct Loose Stone Sale price¥18,800
フラワールチルインクォーツ ルース

Brazilian Flower Rutile in Quartz 5.122ct Loose Stone Sale price¥7,980
Synthetic Alexandrite 0.287ct loose stone

Synthetic Alexandrite 0.287ct loose stone Sale price¥8,800
合成アレキサンドライト 0.471ctルース

Synthetic Alexandrite 0.471ct loose stone Sale price¥14,800
デンドリティックアゲート 1.679ctルース

Brazilian Dendritic Agate 1.679ct Loose Stone Sale price¥5,980
デンドリティックアゲート 2.788ctルース

Brazilian Dendritic Agate 2.788ct Loose Stone Sale price¥6,980
デンドリティックアゲート 3.575ctルース

Brazilian Dendritic Agate 3.575ct Loose Stone Sale price¥8,800
ラベンダータンザナイト 0.558ctルース

Tanzanian Lavender Tanzanite 0.558ct Loose Stone Sale price¥12,800
バイカラータンザナイト 0.573ctルース

Tanzanian bicolor tanzanite 0.573ct loose stone Sale price¥12,800
タンザニア産ラベンダータンザナイト 0.577ctルース

Tanzanian Lavender Tanzanite 0.577ct Loose Stone Sale price¥12,800
ピンクトルマリン 0.418ctルース

Brazilian Pink Tourmaline 0.418ct Loose Stone (Rouge Cut) Sale price¥8,800
モンタナアゲート 9.528ctルース

Montana Agate 9.528ct Loose Sale price¥8,800
オレゴンサンストーン 0.736ctルース

Oregon Sunstone from the United States 0.736ct loose stone Sale price¥8,800
ブラジル産ルチルレイテッドクォーツ 1.406ctルース

Brazilian rutilated quartz (rutilated quartz) 7.8mm/1.406ct loose stone Sale price¥8,800
ブラジル産ルチルレイテッドクォーツ 1.482ctルース

Brazilian rutilated quartz (rutilated quartz) 8.1mm/1.482ct loose stone Sale price¥8,800
ブラジル産ルチルレイテッドクォーツ 2.090ctルース

Brazilian rutilated quartz (rutilated quartz) 8.2mm/2.090ct loose stone Sale price¥8,800
ロシア産ダイヤモンド原石（ソーヤブル） 0.088ctルース

Russian rough diamond (sawable) 0.088ct loose Sale price¥19,800
【甲州貴石切子plusthree】メキシコ産ファイアオパール 4.633ctルース《コラボ》 ワッペン

[Koshu Precious Stones plusthree] Mexican Fire Opal 4.633ct Loose Stone [Collaboration] Patch Sale price¥49,800
スリランカ産クリソベリルキャッツアイ 1.514ctルース

Sri Lankan Chrysoberyl Cat's Eye 1.514ct Loose Stone Sale price¥5,980
スリランカ産クリソベリルキャッツアイ 1.074ctルース

Sri Lankan Chrysoberyl Cat's Eye 1.074ct Loose Stone Sale price¥4,980
スペイン産スファレライト 1.753ctルース

Spanish Sphalerite 7.0mm/1.753ct loose stone Sale price¥35,800
ブラジル産パライバトルマリン 0.360ctルース GIA鑑別書

Brazilian Paraiba Tourmaline 0.360ct Loose GIA Sale price¥298,000
スリランカ産イエローサファイア 0.349ctルース

Sri Lankan Yellow Sapphire 0.349ct Loose Sale price¥12,800
合成モアッサナイト 0.678ctルース

Synthetic Moissanite 5.8mm/0.678ct Loose Stone Sale price¥8,800
Brazilian Green Tourmaline 0.825ct Loose Stone

Brazilian Green Tourmaline 0.825ct Loose Stone Sale price¥9,800
Brazilian Green Tourmaline 0.376ct Loose Stone

Brazilian Green Tourmaline 0.376ct Loose Stone Sale price¥7,980
Brazilian Green Tourmaline 0.332ct Loose Stone

Brazilian Green Tourmaline 0.332ct Loose Stone Sale price¥7,980
ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 0.344ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 0.344ct Loose Stone Sale price¥9,800
Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases

Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases Sale price¥4,980
タンザニア産バイカラーゾイサイト 0.486ctルース

Tanzania Bicolor Zoisite 4.7mm/0.486ct Loose Stone Sale price¥9,800
Tanzanite from Tanzania 0.245ct loose stone

Tanzanite from Tanzania 0.245ct loose stone Sale price¥8,800
タンザニア産バイカラーゾイサイト 0.295ctルース

Tanzania Bicolor Zoisite 0.295ct Loose Stone Sale price¥7,980
オーストラリア産ブラックオパール 3.242ctルース

Australian black opal 3.242ct loose stone Sale price¥59,800
合成モアッサナイト 0.634ctルース

Synthetic Moissanite 0.634ct loose stone Sale price¥9,800
アルマンディンガーネット 1.471ctルース

Almandine Garnet 1.471ct Loose Stone Sale price¥14,800
アルマンディンガーネット 1.388ctルース

Almandine Garnet 1.388ct Loose Stone Sale price¥11,800
アルマンディンガーネット 1.988ctルース

Almandine Garnet 1.988ct Loose Stone Sale price¥16,800
アルマンディンガーネット 1.485ctルース

Almandine Garnet 1.485ct Loose Stone Sale price¥15,800
アルマンディンガーネット 1.058ctルース

Almandine Garnet 1.058ct Loose Stone Sale price¥12,800
ブルーサファイア 0.287ctルース

Blue sapphire 0.287ct loose Sale price¥12,800
非加熱ブラジル産パライバトルマリン 0.060ctルース（CuO:1.6%、MnO:2.3%）

Brazilian Paraiba Tourmaline 0.060ct Loose (CuO:1.6%, MnO:2.3%) Sale price¥42,800
See more list of new arrivals

《Products eligible for multiple purchase discount》

Limited to 10 stones: Brazilian Bicolor Tourmaline (Baguette Cut) - 1 loose stone. Discounts available for multiple purchases.

Limited to 10 stones: Brazilian Bicolor Tourmaline (Baguette Cut) - 1 loose stone. Discounts available for multiple purchases. Sale price¥29,800
【Sale starts 10PM on June 27th】《Limited 8 Stones》Myanmar Black Spinel (B Grade)《Multiple Purchase Discount Available》

【Sale starts 10PM on June 27th】《Limited 8 Stones》Myanmar Black Spinel (B Grade)《Multiple Purchase Discount Available》 Sale price¥1,980
[On Sale June 28th, 10 PM] Brazilian Paraiba Tourmaline Gacha with Sorting Report (CuO: 2.1%, MnO: 2.2%) - Limited to 18 Stones! (Multiple Purchase Discount Available)

[On Sale June 28th, 10 PM] Brazilian Paraiba Tourmaline Gacha with Sorting Report (CuO: 2.1%, MnO: 2.2%) - Limited to 18 Stones! (Multiple Purchase Discount Available) Sale price¥9,800
[Sale on June 27th at 10 PM] Limited to 2 Stones: Myanmar Red Spinel (Pear Shape approx. 4x3mm) - Multi-Purchase Discount Available

[Sale on June 27th at 10 PM] Limited to 2 Stones: Myanmar Red Spinel (Pear Shape approx. 4x3mm) - Multi-Purchase Discount Available Sale price¥9,800
[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available

[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available Sale price¥9,800
[On Sale June 28th at 10 PM] Limited to 10 Stones: Brazilian Mint-Color Montebrasite (Princess Cut approx. 3.5mm) - 1 Loose Stone (Volume Discount Available)

[On Sale June 28th at 10 PM] Limited to 10 Stones: Brazilian Mint-Color Montebrasite (Princess Cut approx. 3.5mm) - 1 Loose Stone (Volume Discount Available) Sale price¥3,980
[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available]

[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available] Sale price¥5,980
[On sale June 27th at 10 PM] Limited to 10 Stones: Sri Lankan Chrysoberyl (Cut by Mr. Sanje) Gacha (Includes Parrot Color, Canary Yellow) [Multiple Purchase Discount Available]

[On sale June 27th at 10 PM] Limited to 10 Stones: Sri Lankan Chrysoberyl (Cut by Mr. Sanje) Gacha (Includes Parrot Color, Canary Yellow) [Multiple Purchase Discount Available] Sale price¥3,980
[On Sale June 27, 10 PM JST] "Limited to 10 Stones" Rough Stone Gacha including Paraiba Tourmaline (CuO: 1.7%+ content) and Benitoite (with a bonus Oregon Sunstone) "Multiple Purchase Discount Available"

[On Sale June 27, 10 PM JST] "Limited to 10 Stones" Rough Stone Gacha including Paraiba Tourmaline (CuO: 1.7%+ content) and Benitoite (with a bonus Oregon Sunstone) "Multiple Purchase Discount Available" Sale price¥2,980
[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available)

[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available) Sale price¥7,980
Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases

Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases Sale price¥4,980
Kyanite from Nepal, 1 loose stone (indigo blue color, 4 x 6 mm, emerald cut) {Multiple purchase discount available}

Kyanite from Nepal, 1 loose stone (indigo blue color, 4 x 6 mm, emerald cut) {Multiple purchase discount available} Sale price¥2,980
[Available June 20th at 10 PM] Limited to 21 pieces - Kochi Prefecture Blood Coral Branch (rough) 1 stone (March birthstone, coral, average 4.7ct) - Multiple purchase discount available

[Available June 20th at 10 PM] Limited to 21 pieces - Kochi Prefecture Blood Coral Branch (rough) 1 stone (March birthstone, coral, average 4.7ct) - Multiple purchase discount available Sale price¥5,980
[Sale on June 19th at 10 PM] "Limited to 20 pieces" Kochi Prefecture Blood Coral Branch (raw, unworked) 1 piece (March birthstone, coral, average 5.8ct) "Discounts for multiple purchases available"

[Sale on June 19th at 10 PM] "Limited to 20 pieces" Kochi Prefecture Blood Coral Branch (raw, unworked) 1 piece (March birthstone, coral, average 5.8ct) "Discounts for multiple purchases available" Sale price¥6,980
[On sale June 21st at 10 PM] [Limited to 1 set] Amethyst & Citrine Symmetrical Pair Cut Set 66.58ct Loose Gemstones [Multiple Purchase Discount Available]

[On sale June 21st at 10 PM] [Limited to 1 set] Amethyst & Citrine Symmetrical Pair Cut Set 66.58ct Loose Gemstones [Multiple Purchase Discount Available] Sale price¥29,800
【Sale starts June 19th, 10 PM】《Limited to 10 stones》Madagascar Andesine-Labradorite (Rainbow Moonstone) Gacha, 1 Loose Stone (Avg. 0.40ct)《Multiple Purchase Discount Available》

【Sale starts June 19th, 10 PM】《Limited to 10 stones》Madagascar Andesine-Labradorite (Rainbow Moonstone) Gacha, 1 Loose Stone (Avg. 0.40ct)《Multiple Purchase Discount Available》 Sale price¥2,980
[On sale June 20 at 10 PM] Limited to 5 Stones: Cambodian Ratanakiri Blue Zircon Gacha (Avg. 0.73ct) (Bulk Purchase Discount Available)

[On sale June 20 at 10 PM] Limited to 5 Stones: Cambodian Ratanakiri Blue Zircon Gacha (Avg. 0.73ct) (Bulk Purchase Discount Available) Sale price¥6,980
[Sales begin 6/20 10 PM] Limited to 12 Stones: Madagascar Andesine & Labradorite (Rainbow Moonstone & Blue Moonstone) 2-Stone Set (Average 0.60ct) - Multiple Purchase Discount Available

[Sales begin 6/20 10 PM] Limited to 12 Stones: Madagascar Andesine & Labradorite (Rainbow Moonstone & Blue Moonstone) 2-Stone Set (Average 0.60ct) - Multiple Purchase Discount Available Sale price¥3,980
[On sale June 19th at 10 PM] "Limited 7 Stones" Anthill Garnet Single Loose Stone (Oval Cut, approx. 4x3mm) "Multiple Purchase Discount Available"

[On sale June 19th at 10 PM] "Limited 7 Stones" Anthill Garnet Single Loose Stone (Oval Cut, approx. 4x3mm) "Multiple Purchase Discount Available" Sale price¥3,980
[Sales begin 10 PM JST on 6/21] Dragon Garnet Single Loose Stone (Round Cut, 5mm) - Limited to 5 Stones - Multi-Purchase Discount Available

[Sales begin 10 PM JST on 6/21] Dragon Garnet Single Loose Stone (Round Cut, 5mm) - Limited to 5 Stones - Multi-Purchase Discount Available Sale price¥8,800
[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥6,980
[On sale June 21st at 10 PM] Ruby Gacha (with synthetic ruby as a bonus) including two pigeon blood rubies with appraisal certificates (limited to 15 stones) - Multiple purchase discount available

[On sale June 21st at 10 PM] Ruby Gacha (with synthetic ruby as a bonus) including two pigeon blood rubies with appraisal certificates (limited to 15 stones) - Multiple purchase discount available Sale price¥5,980
Limited to 7 stones: 1 loose Andesine Labradorite stone from Madagascar. Discounts available for multiple purchases.

Limited to 7 stones: 1 loose Andesine Labradorite stone from Madagascar. Discounts available for multiple purchases. Sale price¥2,980
Limited to 8 stones: 1 loose Brazilian ametrine (concave cut, average 10 carats) Multiple purchase discounts available

Limited to 8 stones: 1 loose Brazilian ametrine (concave cut, average 10 carats) Multiple purchase discounts available Sale price¥3,980
[On sale May 24th at 10 PM] "Limited to 12 Stones" Blue Gemstone Gacha 💎 Brazil Paraiba Tourmaline (CuO: 1.5%, MnO: 3.2%) and Zimbabwe Euclase, normally priced at ¥35,800, and more! (Multiple purchase discount available)

[On sale May 24th at 10 PM] "Limited to 12 Stones" Blue Gemstone Gacha 💎 Brazil Paraiba Tourmaline (CuO: 1.5%, MnO: 3.2%) and Zimbabwe Euclase, normally priced at ¥35,800, and more! (Multiple purchase discount available) Sale price¥3,980
[On Sale June 13, 10 PM] [Limited to 2 Stones] Brown Diamond (4mm/0.3ct, with certificate) [Multiple Purchase Discount Available]

[On Sale June 13, 10 PM] [Limited to 2 Stones] Brown Diamond (4mm/0.3ct, with certificate) [Multiple Purchase Discount Available] Sale price¥5,980
See more products eligible for multiple purchase discounts

Bungo and Alchemist

K18 ブルーサファイア 1.89ct・ダイヤモンド0.74ctリング 鑑別書

[On sale June 27th at 10 PM] [Colorflee] K18 Blue Sapphire 1.89ct / Diamond 0.74ct Ring with Appraisal Report Sale price¥298,000
Pt900グロッシュラーガーネット 1.38ct・ダイヤモンド0.13ctリング 鑑別書

[On sale 6/27 10 PM] [Colorful] Pt900 Grossular Garnet 1.38ct and Diamond 0.13ct Ring with Appraisal Sale price¥98,000
K18 白蝶真珠（白蝶パール） 鳥モチーフ ペンダントトップ（ネックレストップ） 鑑別書

[Sale on 6/22 at 10 PM] Colorful K18 White South Sea Pearl, 0.17ct Diamond, Ruby, Sapphire, Emerald Bird Motif Pendant Top (Necklace Top) with Appraisal Report Sale price¥198,000
K18 ルビー 0.44ct・ダイヤモンド0.18ctリング 鑑別書

[Sale starts June 22nd, 10 PM] Colorful K18 Ruby 0.44ct & Diamond 0.18ct Ring with Appraisal Report Sale price¥148,000
Pt900/K18 ルビー 0.28ct・ダイヤモンド0.20ct リング 鑑別書

[Sale starts 10 PM, June 22] [Colorfuri] Pt900/K18 Ruby 0.28ct / Diamond 0.20ct Ring with Appraisal Report Sale price¥128,000
K18 ブルーサファイア・ダイヤモンドリング 鑑別書

[On sale June 27, 10 PM] Colorful K18 Blue Sapphire and Diamond Ring with Certificate Sale price¥128,000
K18WG ダイヤモンド ペンダントトップ（ネックレストップ）

[Available June 18th at 10 PM] [Colorful] K18WG Diamond 1.03ct Pendant Top Sale price¥128,000
K18 アコヤパール・ダイヤモンド0.08ct リング 鑑別書

[Sale from 10 PM on June 18th] [Colorful] K18 Akoya Pearl and Diamond 0.08ct Ring with Certificate Sale price¥49,800
K18 ロードクロサイト 0.77ct リング 鑑別書

[Sales start June 20th at 10 PM JST] [Colorfuri] K18 Rhodochrosite 0.77ct Ring with Certificate Sale price¥39,800
Pt900/K18 ダイヤモンド 0.22ctリング 鑑別書

[On Sale June 20, 10 PM JST] [Colorfuri] Pt900/K18 Diamond 0.22ct Ring with Certificate Sale price¥98,000
Pt900 ブルーサファイア 2.38ct・ダイヤモンド0.20ctリング 鑑別書

[On sale 6/25 10 PM] [COLORFUL] Pt900 Blue Sapphire 2.38ct and Diamond 0.20ct Ring with Appraisal Report Sale price¥198,000
Pt900 ブルーサファイア 1.05ct・ダイヤモンド0.05ctリング 鑑別書

[On sale June 20th at 10 PM] Colorful Pt900 Blue Sapphire 1.05ct/Diamond 0.05ct Ring with Appraisal Report Sale price¥98,000
K18WG クロムトルマリン 0.70ctct・サファイア0.30ctペンダントトップ（ネックレストップ） 鑑別書

[On sale 10 PM on 6/14] [Colorful] K18WG Chrome Tourmaline 0.70ct / Sapphire 0.30ct Pendant Top (Necklace Top) with appraisal Sale price¥79,800
K18WG ジルコン ペンダントトップ（ネックレストップ） 鑑別書

[Sale on June 25th at 10 PM] [Colorful] K18WG Zircon Pendant Top (Necklace Top) with Appraisal Report Sale price¥59,800
Pt900 タイ産サファイア 1.33ct リング

[Available June 12, 10 PM JST] [Colorfuri] Pt900 Thai Sapphire 1.33ct and Diamond 0.12ct Ring with GIA Report Sale price¥198,000
Pt900 マダガスカル産サファイア 0.99ct リング

[On sale June 12th at 10 PM] [Colorfuri] Pt900 Madagascar Sapphire 0.99ct / Diamond 0.58ct Ring GIA Sale price¥228,000
Pt900 ダイヤモンド 1.00ctct ペンダント（ネックレス）

[COLORFUL] Pt900 Diamond 1.00ct Pendant (Necklace) Sale price¥49,800
K18WG ダイヤモンド 0.5ct ペンダント（ネックレス）

[On sale May 26th, 10 PM] Colorful K18WG Diamond 0.40ct Pendant (Necklace) Sale price¥79,800
Pt900 ブラジル産パライバトルマリン 0.06ct ペンダント（ネックレス）

[On sale 5/26 10 PM] [Colorful] Pt900 Paraiba Tourmaline from Brazil 0.06ct / Diamond 0.18ct Pendant Top (CuO:2.6%, MnO:3.5%) Sale price¥69,800
Pt900 アイスブルーダイヤモンド（トリートメント） 0.256ctct ペンダント（ネックレス）

[On Sale 5/26 at 10 PM] Colorful Pt900 Ice Blue Diamond (Treated) 0.256ct / Diamond 0.06ct Pendant (Necklace) Sale price¥98,000
K18 クォーツァイト ペンダントトップ（ネックレストップ）

【Calafuri】K18 Quartzite Pendant Top (Necklace Top) Sale price¥49,800
Pt900 ダイヤモンド 0.65ctct ペンダントトップ（ネックレストップ）

[Colorful] Pt900 Diamond 0.65ct Pendant Top Sale price¥89,800
[On sale May 14 at 10 PM] Colorful WISH UPON A STAR® 3.5mm/0.166ct/F/VS1 Diamond with Certificate

[On sale May 14 at 10 PM] Colorful WISH UPON A STAR® 3.5mm/0.166ct/F/VS1 Diamond with Certificate Sale price¥39,800
Pt900 ダイヤモンド 0.50ct リング

[Sales begin May 18 at 10 PM JST] [Colorflee] Pt900 Diamond 0.50ct Ring Sale price¥79,800
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KARATZ collaboration
See all KARATZ collaborations

jewelry

K18PGマダガスカル産ピンクサファイア0.24ct0.25ctピアス（アッシャーカット）
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Custom-made with a choice of stones

1石から選ぶオーダーメイド《リ ング》申し込みページ ～ Solo(ソロ) ～ - カラッツSTORE
1石から選ぶオーダーメイド《ペ ンダント》申し込み～ SOLO(ソロ) ～ - カラッツSTORE
1石から選ぶオーダーメイド《ピ アス》申し込みページ ～ Solo(ソロ) ～ - カラッツSTORE
Learn more about custom-made products

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZ's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

KARATZ publishes "Gemstone Encyclopedia"

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.