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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
KARATZ Books
Custom-made jewelry with stones
Mini Bottle Keychain Filled with Natural Stones (Choose from 11 Colors)

NEWS

2026/06/19

[Applications close Thursday, June 25 at 10:00 AM JST: Lottery Sale] 13 Carefully Selected Items Including Tashmarine, Flawless Diamonds, and Kashmir Sapphires

2026/06/13

[Deadline: Thursday, June 18th, 10 am for lottery sale] 10 carefully selected items including Jedi Spinel, Bekily Blue Garnet, Kashmir Sapphire, and Burma Sapphire

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

coming soon 【12563038掲載】カシミール産非加熱サファイア 0.300ctルース

【Lottery Sale 0620_05】Kashmir Unheated Sapphire 0.300ct Loose Stone GIA Sale price¥128,000
coming soon [Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA

[Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA Sale price¥88,000
coming soon 【Lottery Sale 0620_09】Flawless Diamond (H&C) 4.2mm/0.280ct Loose Stone (D, FL, 3Excellent H&C) GIA&CGL

【Lottery Sale 0620_09】Flawless Diamond (H&C) 4.2mm/0.280ct Loose Stone (D, FL, 3Excellent H&C) GIA&CGL Sale price¥188,000
coming soon 【12563227掲載】高知県産ボケ珊瑚（サンゴ） 6.735ctルース

[Lottery Sale 0620_06] Boké Coral (Kochi Prefecture) 6.735ct Loose Sale price¥39,800
coming soon 【12541487掲載】スリランカ産ダイオプサイド 1.228ctルース

[Posted in 12541487] Diopside from Sri Lanka 1.228ct loose Sale price¥25,800
coming soon 【12562588掲載】キャシテライト 0.868ctルース

[Lottery Sale 0620_02] Chinese Hunan Province Cassiterite 0.868ct Loose Stone with Certificate Sale price¥98,000
coming soon 【12563301掲載】カシミール産非加熱サファイア 0.100ctルース

[Lottery Sale 0620_04] Unheated Kashmir Sapphire 2.6mm/0.100ct Loose Stone GIA Sale price¥69,800
coming soon Pink diamond 2.3mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.3mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥69,800
coming soon Pink diamond 2.2mm/0.041ct loose (FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.2mm/0.041ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥49,800
coming soon ピンクダイヤモンド 0.055ctルース(FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.4mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥59,800
coming soon 【12562015掲載】南アフリカ産南アフリカ産ロードクロサイト 2.694ctルース

[Lottery Sale 0620_03] South African Rhodochrosite 2.694ct Loose Stone Sale price¥228,000
coming soon 【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab

【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab Sale price¥198,000
coming soon [Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA

[Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA Sale price¥138,000
See Lottery Sale List

6/23 (Tues) New Arrivals & Updates

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
Sold out [On sale June 19th, 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1 "The Big Five Gemstones"

[On sale June 19th, 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1 "The Big Five Gemstones"
{June Campaign Limited Edition} Rare Stone Gacha💎 Padparadscha Sapphire 0.3ct+ with Certificate, Benitoite, Red Beryl, etc. Loose Stones for 1 Stone {Multiple Purchase Discounts Available}

{June Campaign Limited Edition} Rare Stone Gacha💎 Padparadscha Sapphire 0.3ct+ with Certificate, Benitoite, Red Beryl, etc. Loose Stones for 1 Stone {Multiple Purchase Discounts Available} Sale price¥7,980
coming soon 【12563353掲載】ナミビア産ジェレメジェバイト 0.095ctルース

[Posted 12563353] Namibian Jeremejevite 0.095ct Loose Gemstone Sale price¥24,800
coming soon Tanzanite from Tanzania 0.245ct loose stone

Tanzanite from Tanzania 0.245ct loose stone Sale price¥8,800
coming soon 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
coming soon 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
coming soon 【12563294掲載】マダガスカル産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 0.640ctルース

[Listed as 12563294] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.640ct Loose Sale price¥6,980
coming soon 合成モアッサナイト 0.634ctルース

Synthetic Moissanite 0.634ct loose stone Sale price¥9,800
coming soon 【12563367掲載】アメリカ産シーライト 2.666ctルース

[Sale on 6/25 at 10 PM] US Scheelite 2.666ct Loose Gemstone with Certificate Sale price¥15,800
coming soon 【12563366掲載】アメリカ産シーライト 1.943ctルース

[Sales start June 25th at 10 PM JST] American Scheelite 1.943ct Loose Stone with Certificate Sale price¥12,800
coming soon 【On Sale 6/25 10 PM JST】Euclase from Zimbabwe 0.070 ct Loose Stone with Certificate

【On Sale 6/25 10 PM JST】Euclase from Zimbabwe 0.070 ct Loose Stone with Certificate Sale price¥16,800
coming soon [Sale on June 25th at 10 PM] Zimbabwe Euclase 0.067ct Loose Stone with Certification

[Sale on June 25th at 10 PM] Zimbabwe Euclase 0.067ct Loose Stone with Certification Sale price¥15,800
coming soon [On sale June 25, 10 PM] [Colorful] K14WG Black Diamond 0.89ct / Diamond 0.13ct Pendant Top (Necklace Top) with Certificate of Authenticity

[On sale June 25, 10 PM] [Colorful] K14WG Black Diamond 0.89ct / Diamond 0.13ct Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥45,800
coming soon [Sale on June 25th at 10 PM] [Colorful] K18WG Zircon Pendant Top (Necklace Top) with Appraisal Report

[Sale on June 25th at 10 PM] [Colorful] K18WG Zircon Pendant Top (Necklace Top) with Appraisal Report Sale price¥59,800
coming soon 【22602632掲載】【カラフリ】Pt900 ブルーサファイア 2.38ctct リング

[On sale 6/25 10 PM] [COLORFUL] Pt900 Blue Sapphire 2.38ct and Diamond 0.20ct Ring with Appraisal Report Sale price¥198,000
coming soon [On sale June 25th at 10 PM] [ColorFuli] K18WG Green Quartz and 0.02ct Diamond Pendant Top

[On sale June 25th at 10 PM] [ColorFuli] K18WG Green Quartz and 0.02ct Diamond Pendant Top Sale price¥59,800
coming soon ブルーサファイア 0.287ctルース

Blue sapphire 0.287ct loose Sale price¥12,800
coming soon 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
coming soon 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
coming soon 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
coming soon オレゴンサンストーン 0.713ctルース

Oregon Sunstone 0.713ct loose Sale price¥4,980
coming soon 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
coming soon 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
coming soon 【32501953掲載】 グリーンダイヤモンド（トリートメント） 0.183ctルース(FANCY INTENSE YELLOW GREEN TREATED, VS1)

[On sale June 26th at 10 PM] Green Diamond (Treated) 3.6mm/0.183ct Loose Stone (FANCY INTENSE YELLOW GREEN TREATED, VS1) Sale price¥39,800
coming soon ジンバブエ産ユークレース 0.206ctルース

Zimbabwe Euclase 0.206 ct Loose Gemstone Sale price¥29,800
coming soon 【12563298掲載】メデューサクォーツ（パライバクォーツ） 0.479ctルース

[Published on 12563298] Medusa Quartz (Paraiba Quartz) 0.479ct Loose Gemstone Sale price¥12,800
coming soon 【12563261掲載】ロシア産ダイヤモンド原石（ソーヤブル） 0.098ct原石

[Listing 12563261] Rough Russian Diamond (Sawable) 0.098ct Rough Stone Sale price¥25,800
coming soon 【12563265掲載】ロシア産ダイヤモンド原石（ソーヤブル） 0.148ct原石

[Published under 12563265] Russian rough diamond (sawable), 0.148 ct Sale price¥49,800
coming soon 【12563299掲載】スリランカ産シルキーサファイア 0.488ctルース

[Posted as 12563299] Sri Lankan Silky Sapphire 0.488ct Loose Stone Sale price¥7,980
coming soon 【12563296掲載】マダガスカル産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 0.807ctルース

[Listed as 12563296] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.807ct Loose Stone Sale price¥8,800
coming soon 【Listed as 12563363】Canary Yellow Chrysoberyl from Madagascar 0.292ct Loose Gemstone

【Listed as 12563363】Canary Yellow Chrysoberyl from Madagascar 0.292ct Loose Gemstone Sale price¥8,800
coming soon [Published 12563364] Madagascar Canary Yellow Chrysoberyl 0.569ct Loose Gemstone

[Published 12563364] Madagascar Canary Yellow Chrysoberyl 0.569ct Loose Gemstone Sale price¥9,800
coming soon [22602647 listed] [Colorful] K18 Blue Sapphire Ring

[22602647 listed] [Colorful] K18 Blue Sapphire Ring Sale price¥128,000
coming soon 【6/27 22時販売】【カラフリ】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

【6/27 22時販売】【カラフリ】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 Sale price¥298,000
coming soon 【6/27 22時販売】【カラフリ】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

【6/27 22時販売】【カラフリ】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 Sale price¥98,000
Tanzanian Rhodolite Garnet 0.810ct Loose Stone

Tanzanian Rhodolite Garnet 0.810ct Loose Stone Sale price¥9,800
ロードライトガーネット 0.448ctルース

Tanzanian Rhodolite Garnet 0.448ct Loose Stone Sale price¥6,980
ジンバブエ産ユークレース 0.183ctルース

[On Sale June 24 at 10 PM] Zimbabwe Euclase 0.183 ct Loose Stone with Certificate Sale price¥35,800
ロシア産ダイヤモンド原石（ソーヤブル） 0.103ctルース

Russian Diamond Rough (Sawable) 0.103ct Loose (Trigon) Sale price¥25,800
アメリカ産ハーキマーダイヤモンド 0.528ctルース

American Herkimer Diamond (Rock Crystal) 5.5mm/0.528ct Loose Sale price¥8,800
タンザニア産コーネルピンキャッツアイ 1.608ctルース

Tanzanian Kornerupine Cat's Eye 1.608ct Loose Stone Sale price¥6,980
Sold out タンザナイト 0.760ctルース

Tanzanite 0.760ct loose stone (sugarloaf cut)
ゴーシェナイト 0.572ctルース

Goshenite 5.7mm/0.572ct loose stone Sale price¥5,980
非加熱ブラジル産パライバトルマリン 0.068ctルース（CuO:1.7%、MnO:2.4%）

Unheated Brazilian Paraiba Tourmaline 0.068ct loose stone (CuO: 1.7%, MnO: 2.4%) Sale price¥45,800
Sold out マダガスカル産ブルーサファイア 0.406ctルース

[On sale June 23rd at 10 PM] Madagascar Blue Sapphire 4.5mm/0.406ct Loose Stone

Sold out [On sale 10 PM JST, June 23] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 5.0mm/0.610ct Loose Stone

[On sale 10 PM JST, June 23] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 5.0mm/0.610ct Loose Stone

[On sale June 23rd, 10 PM JST] Colombian Trapiche Emerald 0.210ct Loose Stone

[On sale June 23rd, 10 PM JST] Colombian Trapiche Emerald 0.210ct Loose Stone Sale price¥39,800
Show more

List of new arrivals

coming soon オレゴンサンストーン 0.713ctルース

Oregon Sunstone 0.713ct loose Sale price¥4,980
ダイヤモンド 0.144ctルース(I, VS1, Good)

[On sale 6/20 10 PM JST] Loose Diamond 3.4mm/0.144ct (I, VS1, Good) Sale price¥16,800
イエローダイヤモンド（トリートメント） 0.190ctルース(FANCY INTENSE YELLOW*, SI-2)

[Sale starts at 10 PM on June 20th] Yellow Diamond (treated) 0.190ct Loose Stone (FANCY INTENSE YELLOW, SI-2) Sale price¥19,800
ジンバブエ産ブルーアパタイト（UVタイプ） 0.650ctルース

Zimbabwean Blue Apatite (UV Type) 0.650ct Loose Sale price¥9,800
Bolivian Ametrine 36.887ct loose stone

Bolivian Ametrine 36.887ct loose stone Sale price¥79,800
YAG（イットリウムアルミニウムガーネット） 0.317ctルース

YAG (Yttrium Aluminum Garnet) 3.9mm/0.317ct loose stone Sale price¥6,980
YAG（イットリウムアルミニウムガーネット） 0.574ctルース

YAG (Yttrium Aluminum Garnet) 4.9mm/0.574ct loose stone Sale price¥8,800
YAG（イットリウムアルミニウムガーネット） 0.672ctルース

YAG (Yttrium Aluminum Garnet) 5.0mm/0.672ct loose stone Sale price¥9,800
合成ルチル 0.942ctルース

Synthetic rutile 0.942ct loose stone Sale price¥14,800
合成オパール 1.804ctルース

Synthetic Opal 1.804ct Loose Sale price¥12,800
YAG（イットリウムアルミニウムガーネット） 0.346ctルース

YAG (Yttrium Aluminum Garnet) 4.1mm/0.346ct Loose Stone (Rose Cut) Sale price¥8,800
YAG（イットリウムアルミニウムガーネット） 0.208ctルース

YAG (Yttrium Aluminum Garnet) 3.3mm/0.208ct Loose Stone (Rose Cut) Sale price¥5,980
ファイアオパール 0.718ctルース

Mexican Fire Opal 0.718ct Loose Sale price¥9,800
ファイアオパール 0.593ctルース

Mexican Fire Opal 0.593ct Loose (Faceted Cut) Sale price¥9,800
アルマンディンガーネット 0.660ctルース

Almandine Garnet 0.660ct Loose Sale price¥6,980
Brazilian Amethyst 9.749ct Loose Stone

Brazilian Amethyst 9.749ct Loose Stone Sale price¥12,800
ナイジェリア産バイカラートルマリン 0.379ctルース

Nigerian bicolor tourmaline 0.379ct loose stone Sale price¥6,980
タンザニア産グリーンサファイア 0.303ctルース

Tanzanian green sapphire 0.303ct loose stone Sale price¥8,800
スリランカ産コバルトスピネル 0.281ctルース

Sri Lankan cobalt spinel 0.281ct loose stone Sale price¥55,800
タンザニア産パープルゾイサイト 0.863ct原石

Tanzania Purple Zoisite 0.863ct Rough Stone Sale price¥7,980
コロンビア産ミントカラーエメラルド 0.297ctルース

Colombian mint color emerald 0.297ct loose stone Sale price¥8,800
ベニトアイト 0.099ctルース (プリンセスカット)

[Updated 12552163] Benitoite 0.099ct loose stone Sale price¥29,800
モザンビーク産パライバトルマリン 0.784ctルース（CuO:0.3%,MnO:1.3%）

[12550887] Paraiba Tourmaline from Mozambique 0.784ct loose stone Sale price¥128,000
オイルインクォーツ 0.438ctルース

Pakistani Oil in Quartz 0.438ct Loose Stone Sale price¥6,980
マダガスカル産サファイア 0.448ctルース

Madagascar sapphire 0.448ct loose stone Sale price¥15,800
ダイヤモンド（カボションカット） 0.206ctルース

Diamond (cabochon cut) 0.206ct loose Sale price¥45,800
ブラジル産アレキサンドライト 0.116ctルース

Brazilian alexandrite 0.116ct loose Sale price¥15,800
オーストラリア産レインボーラティスサンストーン 1.746ctルース

Australian Rainbow Lattice Sunstone 1.746ct Loose Stone Sale price¥12,800
非加熱ブラジル産パライバトルマリン 0.052ctルース

Brazilian Paraiba Tourmaline 0.052ct Loose Stone (CuO:2.0%, MnO:2.2%) Sale price¥35,800
ジェレメジェバイト 0.501ctルース

Namibian Jeremejevite 0.501ct loose stone (bicolor) Sale price¥89,800
スカイブルートパーズ 1.719ctルース

Sky blue topaz 1.719ct loose stone Sale price¥8,800
ピンクトルマリン 0.862ctルース

Brazilian Pink Tourmaline 0.862ct Loose Stone Sale price¥12,800
ベトナム産アクアマリン 0.398ctルース

Vietnam Aquamarine 0.398ct Loose Sale price¥5,980
アクアマリン 0.494ctルース

Vietnam Aquamarine 0.494ct Loose Stone Sale price¥8,800
ブラジル産ブルートルマリン 0.196ctルース

Brazilian Blue Tourmaline 0.196ct Loose Sale price¥6,980
カンボジア産ブルージルコン 0.744ctルース

Cambodian Blue Zircon 0.744ct Loose Stone Sale price¥7,980
グリーントルマリン 2.218ctルース

Brazilian Green Tourmaline 2.218ct Loose Sale price¥25,800
バイカラートルマリン 1.326ctルース

Brazilian Bicolor Tourmaline 7.2mm/1.326ct Loose Stone Sale price¥18,800
グリーントルマリン 1.206ctルース

Namibian Green Tourmaline 7.0mm/1.206ct Loose Stone (Lagoon Tourmaline) Sale price¥59,800
Brazilian Paraiba Tourmaline 0.341ct loose stone (CuO:1.81%, MnO:1.96%) Nakahokan analysis report

Brazilian Paraiba Tourmaline 0.341ct loose stone (CuO:1.81%, MnO:1.96%) Nakahokan analysis report Sale price¥598,000
非加熱ブラジル産パライバトルマリン 0.081ctルース

Unheated Brazilian Paraiba Tourmaline 0.081ct loose stone (CuO: 2.1%, MnO: 2.3%) Sale price¥75,800
Unheated Brazilian Paraiba Tourmaline 0.088ct loose stone (CuO: 1.9%, MnO: 2.3%)

Unheated Brazilian Paraiba Tourmaline 0.088ct loose stone (CuO: 1.9%, MnO: 2.3%) Sale price¥69,800
Morganite 0.379ct loose stone

Morganite 0.379ct loose stone Sale price¥7,980
See more list of new arrivals

《Products eligible for multiple purchase discount》

{June Campaign Limited Edition} Rare Stone Gacha💎 Padparadscha Sapphire 0.3ct+ with Certificate, Benitoite, Red Beryl, etc. Loose Stones for 1 Stone {Multiple Purchase Discounts Available}

{June Campaign Limited Edition} Rare Stone Gacha💎 Padparadscha Sapphire 0.3ct+ with Certificate, Benitoite, Red Beryl, etc. Loose Stones for 1 Stone {Multiple Purchase Discounts Available} Sale price¥7,980
[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
[On sale June 19th at 10 PM] Limited 1 Set: Two Tanzania Illusion Sunstones Cut by NOBU (Multiple purchase discount available)

[On sale June 19th at 10 PM] Limited 1 Set: Two Tanzania Illusion Sunstones Cut by NOBU (Multiple purchase discount available) Sale price¥3,980
[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 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¥7,980
[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
[On sale at 10 PM on 6/21] Sapphire Gacha💎 with a chance to win one of 12 limited cornflower blue sapphires with AIGS certification. Comes with a trillion-cut sapphire bonus. (Multiple purchase discount available)

[On sale at 10 PM on 6/21] Sapphire Gacha💎 with a chance to win one of 12 limited cornflower blue sapphires with AIGS certification. Comes with a trillion-cut sapphire bonus. (Multiple purchase discount available) Sale price¥3,980
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
【Available 10 PM on 6/7】《Limited to 10 Stones》Zircon Gacha including a rare Malawi bicolor zircon, usually priced at 29,800 yen 《Multiple Purchase Discount Available》

【Available 10 PM on 6/7】《Limited to 10 Stones》Zircon Gacha including a rare Malawi bicolor zircon, usually priced at 29,800 yen 《Multiple Purchase Discount Available》 Sale price¥4,980
[On sale June 8th, 10 PM JST] 《Limited to 4 stones》Needle-in-Blue Topaz Gacha💎Average 45ct《Multiple purchase discount available》

[On sale June 8th, 10 PM JST] 《Limited to 4 stones》Needle-in-Blue Topaz Gacha💎Average 45ct《Multiple purchase discount available》 Sale price¥9,800
[On Sale June 6th, 10 PM JST] 11-Piece Limited Edition Madagascar Sapphire Gacha (Including bi-color and silky varieties, 3.5-5.4mm) [Multi-buy discount available]

[On Sale June 6th, 10 PM JST] 11-Piece Limited Edition Madagascar Sapphire Gacha (Including bi-color and silky varieties, 3.5-5.4mm) [Multi-buy discount available] Sale price¥4,980
[On Sale June 7th, 10 PM] Limited to 15 Stones: Afghan Pink Diaspore Single Stone Loose Gemstone (Avg. 0.3ct) - Multiple Purchase Discount Available

[On Sale June 7th, 10 PM] Limited to 15 Stones: Afghan Pink Diaspore Single Stone Loose Gemstone (Avg. 0.3ct) - Multiple Purchase Discount Available Sale price¥3,980
[Sale starts 6/5 at 10 PM JST] 《Limited to 25 sets》Kochi Prefecture Red Coral Branch (Raw Wood) and 2 Loose Stones Set (March Birthstone, Coral) 《Multiple Purchase Discount Available》

[Sale starts 6/5 at 10 PM JST] 《Limited to 25 sets》Kochi Prefecture Red Coral Branch (Raw Wood) and 2 Loose Stones Set (March Birthstone, Coral) 《Multiple Purchase Discount Available》 Sale price¥6,980
[On Sale June 6th]《Limited to 9 Stones》Brazilian Amethyst Single Stone Loose (Includes Elestial and Bi-Color Amethyst)《Bulk Purchase Discount Available》

[On Sale June 6th]《Limited to 9 Stones》Brazilian Amethyst Single Stone Loose (Includes Elestial and Bi-Color Amethyst)《Bulk Purchase Discount Available》 Sale price¥3,980
Mini bottle keychain filled with natural stones (11 colors available, multiple purchase discount)

Mini bottle keychain filled with natural stones (11 colors available, multiple purchase discount) Sale price¥2,800
[On sale May 23rd, 10 PM] "Limited 7 Stones" Kochi Prefecture Blood Coral Loose Gemstones (Oval Cut, 4x6~7mm) "Multi-purchase discount available"

[On sale May 23rd, 10 PM] "Limited 7 Stones" Kochi Prefecture Blood Coral Loose Gemstones (Oval Cut, 4x6~7mm) "Multi-purchase discount available" Sale price¥3,980
See more products eligible for multiple purchase discounts

Bungo and Alchemist

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 アメトリン ペンダントトップ（ネックレストップ） 鑑別書

[Sales start 10 PM JST on 6/22] Colorful K18 Ametrine Cat Motif Pendant Top (Necklace Top) with Appraisal Sale price¥59,800
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
coming soon [22602647 listed] [Colorful] K18 Blue Sapphire Ring

[22602647 listed] [Colorful] K18 Blue Sapphire Ring 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 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
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 合成ルビー ペンダントトップ（ネックレストップ）

[On sale May 30th at 10 PM] [Colorfri] K18 Synthetic Ruby / Synthetic Spinel Pendant Top (Necklace Top) with Certificate of Authenticity 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
K18WG ダイヤモンド 0.126ct ペンダント（ネックレス）

[On sale 5/23 at 10 PM] [Colorful] K18WG Diamond 0.126ct Pendant (Necklace) Sale price¥49,800
K18 ダイヤモンド 0.3ct ペンダント（ネックレス）

[On sale May 23 at 10 PM] [Colorfully] K18 Diamond 0.3ct Pendant Top (Necklace Top) Sale price¥39,800
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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.