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[2/6 (Fri) 10am deadline] A total of 17 items including Koshu precious stone cut glass plusthree made from sphalerite, phosphophyllite, and new jewelry.
February birthstone: Amethyst and Chrysoberyl Cat's Eye
KARATZ Books
Custom-made jewelry with stones
July birthstone: Ruby and Sphene

NEWS

2026/02/05

Campaign in progress! [Gorgeous prizes will be awarded depending on the total amount spent over three days!] February 6, 2026 (Friday) 0:00 to February 8, 2026 (Sunday) 23:59

2026/02/02

[2/6 (Fri) 10am deadline] A total of 17 items including Koshu precious stone cut glass plusthree made from sphalerite, phosphophyllite, and new jewelry.

[Lottery sale: February 6th (Fri) 10am deadline]

coming soon [Lottery Sale 0201_09] 18K Gold and Silver Thai Pigeon Blood Ruby 0.38ct Ring AIGS

[Lottery Sale 0201_09] 18K Gold and Silver Thai Pigeon Blood Ruby 0.38ct Ring AIGS Sale price¥128,000
coming soon [Lottery Sale 0201_07] 18K Yellow Gold Russian Demantoid Garnet (Horsetail Certified) 0.382ct Ring

[Lottery Sale 0201_07] 18K Yellow Gold Russian Demantoid Garnet (Horsetail Certified) 0.382ct Ring Sale price¥158,000
coming soon [Lottery Sale 0201_08] 18K Yellow Gold Brazilian Pink Imperial Topaz 0.909ct Diamond Ring by Nikko Kan

[Lottery Sale 0201_08] 18K Yellow Gold Brazilian Pink Imperial Topaz 0.909ct Diamond Ring by Nikko Kan Sale price¥148,000
coming soon 18K Yellow Gold Ruby Ring

18K Yellow Gold Ruby Ring Sale price¥128,000
coming soon 18K Yellow Gold Colombian Emerald Ring

18K Yellow Gold Colombian Emerald Ring Sale price¥128,000
coming soon [Lottery Sale 0201_10] Pt950 Bicolor Sapphire Pendant Top (Necklace Top)

[Lottery Sale 0201_10] Pt950 Bicolor Sapphire Pendant Top (Necklace Top) Sale price¥79,800
coming soon [Lottery Sale 0201_01] [Koshu Precious Stones Cut by plusthree] 6.417ct Sphalerite Loose Stone from Spain

[Lottery Sale 0201_01] [Koshu Precious Stones Cut by plusthree] 6.417ct Sphalerite Loose Stone from Spain Sale price¥148,000
coming soon [Lottery Sale 0201_02] [Sakura In-Cut] Tibetan Andesine 6.0mm/0.631ct Loose Stone

[Lottery Sale 0201_02] [Sakura In-Cut] Tibetan Andesine 6.0mm/0.631ct Loose Stone Sale price¥29,800
coming soon [Lottery Sale 0201_03] [Dandelion Cut] Madagascar Sphene 0.950ct Loose

[Lottery Sale 0201_03] [Dandelion Cut] Madagascar Sphene 0.950ct Loose Sale price¥49,800
coming soon [Lottery Sale 0201_04] [Sakura Shape] 1.104ct Loose Oregon Sunstone from the United States

[Lottery Sale 0201_04] [Sakura Shape] 1.104ct Loose Oregon Sunstone from the United States Sale price¥59,800
coming soon [Lottery Sale 0201_11] Zimbabwe Green Diamond Rough (Sawable) 0.402ct Rough with Trigon

[Lottery Sale 0201_11] Zimbabwe Green Diamond Rough (Sawable) 0.402ct Rough with Trigon Sale price¥148,000
coming soon [Lottery Sale 0201_12] Zimbabwe Green Diamond Rough (Sawable) 0.428ct Rough with Trigon

[Lottery Sale 0201_12] Zimbabwe Green Diamond Rough (Sawable) 0.428ct Rough with Trigon Sale price¥158,000
coming soon [Lottery Sale 0201_13] Colombian Oil-Free Emerald 0.170ct Loose GIA

[Lottery Sale 0201_13] Colombian Oil-Free Emerald 0.170ct Loose GIA Sale price¥278,000
coming soon [Lottery Sale 0201_14] Colombian Oil-Free Emerald 0.190ct Loose GIA

[Lottery Sale 0201_14] Colombian Oil-Free Emerald 0.190ct Loose GIA Sale price¥228,000
coming soon 【12558592掲載】ボリビア産フォスフォフィライト 0.067ctルース

[Lottery Sale 0201_15] Bolivian Phosphophyllite 0.067ct Loose Stone with Certificate of Authenticity Sale price¥15,800
coming soon 【12560205掲載】フォスフォフィライト 0.741ct原石

[Lottery Sale 0201_16] Bolivian Phosphophyllite 0.741ct Loose Stone with Certificate of Authenticity Sale price¥69,800
coming soon [Lottery Sale 0201_17] Russian Demantoid Garnet (Horsetail) 5.8mm/0.851ct Loose Stone

[Lottery Sale 0201_17] Russian Demantoid Garnet (Horsetail) 5.8mm/0.851ct Loose Stone Sale price¥198,000
Show more

New arrivals and updates on 2/4 (Wed)

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
coming soon [Available at 10 PM on February 6th] [Sri Lanka Support Set] "Beautiful Moonstone Lucky Bag from a New Mine" - Includes four moonstones from Uva, Sri Lanka, worth ¥10,000 each (worth ¥25,000) [Multiple purchase discounts available]

[Available at 10 PM on February 6th] [Sri Lanka Support Set] "Beautiful Moonstone Lucky Bag from a New Mine" - Includes four moonstones from Uva, Sri Lanka, worth ¥10,000 each (worth ¥25,000) [Multiple purchase discounts available] Sale price¥10,000
coming soon [Available at 10 PM on February 2nd] Limited Edition 13 Stones Rare Stone Gacha💎 Shinsha, Mozambique Paraiba Tourmaline, Kornerupine, and Epidote (Multiple Purchase Discounts Available)

[Available at 10 PM on February 2nd] Limited Edition 13 Stones Rare Stone Gacha💎 Shinsha, Mozambique Paraiba Tourmaline, Kornerupine, and Epidote (Multiple Purchase Discounts Available) Sale price¥3,980
coming soon [Available at 10 PM on February 6th] Limited Edition 5 Stones: Approximately 3.3mm VS-Class Diamond Gacha (Usually ¥29,800 Value Included / All Stones Come with Central Gem Laboratory Sorting) [Multiple Purchase Discounts Available]

[Available at 10 PM on February 6th] Limited Edition 5 Stones: Approximately 3.3mm VS-Class Diamond Gacha (Usually ¥29,800 Value Included / All Stones Come with Central Gem Laboratory Sorting) [Multiple Purchase Discounts Available] Sale price¥12,800
coming soon [Available at 10 PM on February 2nd] Limited to 20 stones: Russian Alexandrite, Chrysoberyl Twin Cat's Eye, and Alexandrite Gacha [Multiple purchase discounts available]

[Available at 10 PM on February 2nd] Limited to 20 stones: Russian Alexandrite, Chrysoberyl Twin Cat's Eye, and Alexandrite Gacha [Multiple purchase discounts available] Sale price¥5,980
coming soon [Available at 10 PM on February 2nd] [Limited to 10 stones] Paraiba Tourmaline and Kornerupine Raw Stone Gacha [Multiple purchase discounts available]

[Available at 10 PM on February 2nd] [Limited to 10 stones] Paraiba Tourmaline and Kornerupine Raw Stone Gacha [Multiple purchase discounts available] Sale price¥2,980
coming soon [Available at 10 PM on February 2nd] [Limited to 13 stones] Win Koshu Precious Stone Kiriko Plus Three "Subaru" with the Andesin Gacha! [Multiple purchase discounts available]

[Available at 10 PM on February 2nd] [Limited to 13 stones] Win Koshu Precious Stone Kiriko Plus Three "Subaru" with the Andesin Gacha! [Multiple purchase discounts available] Sale price¥3,980
coming soon 【2/7 22時販売】《限定16石》ロシア産ノンオイルエメラルド等含む💎エメラルドガチャ（エメラルドキャッツアイや特殊カット含む）《複数購入割引有》

【2/7 22時販売】《限定16石》ロシア産ノンオイルエメラルド等含む💎エメラルドガチャ（エメラルドキャッツアイや特殊カット含む）《複数購入割引有》 Sale price¥3,980
coming soon 【2/8 22時販売】《限定15セット》【スリランカ支援セット 】 非加熱グラスボディサファイア原石含む 合計3石＜2万円相当以上＞《複数購入割引有》　

【2/8 22時販売】《限定15セット》【スリランカ支援セット 】 非加熱グラスボディサファイア原石含む 合計3石＜2万円相当以上＞《複数購入割引有》　 Sale price¥8,800
coming soon 【2/8 22時販売】《限定16石》ブルー石ガチャ（バイカラーベニトアイト・ブラジル産パライバトルマリン、サンタマリアアクアマリンなど）《複数購入割引有》

【2/8 22時販売】《限定16石》ブルー石ガチャ（バイカラーベニトアイト・ブラジル産パライバトルマリン、サンタマリアアクアマリンなど）《複数購入割引有》 Sale price¥4,980
coming soon 【2/8 22時販売】《限定11石》通常74,800円の甲州貴石切子plusthree「彩」含むスフェーンガチャ《複数購入割引有》

【2/8 22時販売】《限定11石》通常74,800円の甲州貴石切子plusthree「彩」含むスフェーンガチャ《複数購入割引有》 Sale price¥3,980
coming soon [12561844] Colombian cat's eye emerald 0.417ct loose

[12561844] Colombian cat's eye emerald 0.417ct loose Sale price¥39,800
coming soon Brazilian Rhodonite in Quartz 1.865ct Loose Stone

Brazilian Rhodonite in Quartz 1.865ct Loose Stone Sale price¥12,800
coming soon [On Sale at 10 PM on February 5th] Tanzanite from Tanzania, 4.5mm/0.390ct Loose Stone, AIGS

[On Sale at 10 PM on February 5th] Tanzanite from Tanzania, 4.5mm/0.390ct Loose Stone, AIGS Sale price¥18,800
coming soon [12560411] Brazilian Imperial Topaz 0.353ct Loose Stone

[12560411] Brazilian Imperial Topaz 0.353ct Loose Stone Sale price¥12,800
coming soon [12560419] Cambodian Blue Zircon 1.962ct Loose

[12560419] Cambodian Blue Zircon 1.962ct Loose Sale price¥39,800
coming soon Tanzanite 0.311ct loose stone from Tanzania

Tanzanite 0.311ct loose stone from Tanzania Sale price¥12,800
coming soon Tanzanian Rhodolite Garnet 4.174ct Loose Stone

Tanzanian Rhodolite Garnet 4.174ct Loose Stone Sale price¥29,800
coming soon Tanzanian Rhodolite Garnet 4.393ct Loose Stone

Tanzanian Rhodolite Garnet 4.393ct Loose Stone Sale price¥29,800
coming soon Tanzanite from Tanzania 0.889ct loose stone

Tanzanite from Tanzania 0.889ct loose stone Sale price¥18,800
coming soon Tanzanite 0.579ct loose stone from Tanzania

Tanzanite 0.579ct loose stone from Tanzania Sale price¥5,980
coming soon [12561291] Nepalese Bicolor Kyanite 0.742ct Loose Stone

[12561291] Nepalese Bicolor Kyanite 0.742ct Loose Stone Sale price¥18,800
coming soon [12561426] Cornflower Blue Sapphire 0.370ct Loose

[12561426] Cornflower Blue Sapphire 0.370ct Loose Sale price¥59,800
coming soon [12561429] Unheated Pigeon Blood Ruby 0.520ct Loose

[12561429] Unheated Pigeon Blood Ruby 0.520ct Loose Sale price¥128,000
coming soon [12561430] Unheated Pigeon Blood Ruby 0.510ct Loose

[12561430] Unheated Pigeon Blood Ruby 0.510ct Loose Sale price¥98,000
coming soon [On Sale 2/6 at 10 PM] Oil-Free Red Beryl from the United States, 2.6mm/0.050ct Loose, GIA

[On Sale 2/6 at 10 PM] Oil-Free Red Beryl from the United States, 2.6mm/0.050ct Loose, GIA Sale price¥79,800
coming soon [On Sale 2/6 at 10pm] Colombian Oil-Free Emerald 0.510ct Loose GIA

[On Sale 2/6 at 10pm] Colombian Oil-Free Emerald 0.510ct Loose GIA Sale price¥598,000
coming soon [12561301] Brazilian Yellow Beryl 1.473ct Loose Stone

[12561301] Brazilian Yellow Beryl 1.473ct Loose Stone Sale price¥22,800
coming soon [12561276] Sweet Home Rhodochrosite 0.677ct Loose Stone

[12561276] Sweet Home Rhodochrosite 0.677ct Loose Stone Sale price¥59,800
coming soon [12561274] Kenyan Idocrase 0.650ct Loose Stone

[12561274] Kenyan Idocrase 0.650ct Loose Stone Sale price¥12,800
coming soon [12561273] Tanzanian Kornerupine 0.336ct Loose Stone

[12561273] Tanzanian Kornerupine 0.336ct Loose Stone Sale price¥22,800
coming soon 【12550983掲載】マダガスカル産ペツォッタイト 0.670ctルース

[On Sale 2/6 at 10pm] Madagascar Pezzottaite 0.670ct Loose Stone, Japan-Germany Qualification Sale price¥298,000
coming soon 【12552511掲載】ピンクダイヤモンド 0.296ctルース

[On Sale at 10 PM on 2/6] 0.296ct Pink Diamond Loose (Cabochon Cut) with Certificate of Authenticity Sale price¥188,000
coming soon 中国・貴州省産バライト 1.836ctルース

[Available at 10 PM on 2/6] 1.836ct loose barite from Guizhou, China with certificate of authenticity Sale price¥39,800
coming soon 【22602044掲載】SV925 シーブルーカルセドニー ペンダントトップ（ネックレストップ）

[Available at 10 PM on 2/6] SV925 Sea Blue Chalcedony and Onyx Pendant Top (Necklace Top) by Makoto Nakano Sale price¥29,800
[On Sale 2/3 at 10pm] Colombian Emerald 0.159ct Loose

[On Sale 2/3 at 10pm] Colombian Emerald 0.159ct Loose Sale price¥47,800
[On Sale 2/3 at 10pm] Tanzanian Sunstone 1.477ct Loose

[On Sale 2/3 at 10pm] Tanzanian Sunstone 1.477ct Loose Sale price¥15,800
Bicolor tourmaline 3.242ct rough stone from Afghanistan

Bicolor tourmaline 3.242ct rough stone from Afghanistan Sale price¥5,980
Paraiba tourmaline from Brazil 0.129ct loose (Cu:0.6%,MnO:0.9%)

Paraiba tourmaline from Brazil 0.129ct loose (Cu:0.6%,MnO:0.9%) Sale price¥29,800
ザンビア産アメジスト 39.112ct原石

Amethyst 39.112ct raw stone from Zambia Sale price¥5,980
ザンビア産アメジスト 29.357ct原石

Amethyst 29.357ct raw stone from Zambia Sale price¥3,980
ミャンマー産バイカラースターサファイア 0.920ctルース

Bicolor star sapphire from Myanmar 0.920ct loose Sale price¥39,800
See more new and updated posts from 2/4 (Wed)

List of new arrivals

ブラジル産パライバトルマリン 0.065ctルース （CuO:2.0%、MnO:2.6%）

[On Sale 2/2 at 10 PM] Brazilian Paraiba Tourmaline 0.065ct Loose Stone (CuO: 2.0%, MnO: 2.6%) Sale price¥22,800
スリランカ産クリソベリルキャッツアイ 1.340ctルース

[2/2 22:00 Sale] Sri Lankan Chrysoberyl Cat's Eye 1.340ct Loose Stone Sale price¥6,980
コロンビア産パイライトインエメラルド 8.044ctルース

Colombian pyrite emerald 8.044ct loose stone Sale price¥188,000
ピンクトルマリン 0.656ctルース

Pink tourmaline 0.656ct loose Sale price¥7,980
トルマリン 0.731ctルース

Tourmaline 0.731ct loose Sale price¥5,980
メキシコ産ファイアオパール 0.277ctルース

Mexican Fire Opal 0.277ct Loose (Faceted Cut) Sale price¥5,980
メキシコ産ファイアオパール 0.472ctルース

Mexican Fire Opal 0.472ct Loose (Star Cut, Faceted Cut) Sale price¥8,800
メキシコ産ファイアオパール 0.564ctルース

Mexican Fire Opal 0.564ct Loose (Faceted Cut) Sale price¥12,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.457ct原石

Colombian trapiche emerald (reverse trapiche) 0.457ct rough stone Sale price¥25,800
カンボジア産ブルージルコン（ラタナキリブルー） 0.615ctルース

Cambodian blue zircon (Ratanakiri blue) 0.615ct loose Sale price¥7,980
カンボジア産ブルージルコン（ラタナキリブルー） 0.453ctルース

Cambodian blue zircon (Ratanakiri blue) 0.453ct loose Sale price¥6,980
Pakistani Oil in Quartz 0.651ct Loose Stone

Pakistani Oil in Quartz 0.651ct Loose Stone Sale price¥7,980
Pakistani oil-in quartz 0.595ct loose

Pakistani oil-in quartz 0.595ct loose Sale price¥7,980
パキスタン産オイルインクォーツ 0.443ctルース

Pakistani Oil in Quartz 0.443ct Loose Stone Sale price¥5,980
マダガスカル産オイルインクォーツ 24.653ct原石

Oil-in-quartz 24.653ct rough stone from Madagascar Sale price¥7,980
Andalusite 0.487ct loose

Andalusite 0.487ct loose Sale price¥6,980
オレゴンサンストーン 1.507ctルース

Oregon Sunstone 1.507ct loose Sale price¥9,800
オレゴンサンストーン 0.846ctルース

Oregon Sunstone 0.846ct loose Sale price¥7,980
オレゴンサンストーン 0.852ctルース

Oregon Sunstone 0.852ct loose Sale price¥7,980
メキシコ産オパール 0.790ctルース

Mexican Opal 0.790ct Loose (Contrarus Opal, Faceted Cut) Sale price¥18,800
マダガスカル産オイルインクォーツ 31.973ct原石

Oil-in-quartz 31.973ct rough stone from Madagascar Sale price¥8,800
マダガスカル産オイルインクォーツ 30.677ct原石

Oil-in-quartz 30.677ct rough stone from Madagascar Sale price¥8,800
タンザニア産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 1.396ctルース

Tanzanian Andesine Labradorite (also known as Rainbow Moonstone) 1.396ct loose stone Sale price¥8,800
タンザニア産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 0.782ctルース

Tanzanian Andesine Labradorite (also known as Rainbow Moonstone) 0.782ct loose stone Sale price¥8,800
タンザニア産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 0.928ctルース

Tanzanian Andesine Labradorite (also known as Rainbow Moonstone) 0.928ct loose stone Sale price¥15,800
ルベライト 0.549ctルース

Rubellite 0.549ct loose Sale price¥19,800
グリーントルマリン 2.007ctルース

Green tourmaline 2.007ct loose Sale price¥29,800
Green tourmaline 0.388ct loose

Green tourmaline 0.388ct loose Sale price¥8,800
Green tourmaline 1.258ct loose

Green tourmaline 1.258ct loose Sale price¥29,800
アベンチュリンアクアマリン 1.022ctルース

Aventurine aquamarine 1.022ct loose Sale price¥5,980
アベンチュリンアクアマリン 0.840ctルース

Aventurine aquamarine 0.840ct loose Sale price¥6,980
オレゴンサンストーン 0.513ctルース

Oregon Sunstone 0.513ct loose Sale price¥4,980
ミャンマー産ジョウハチドーライト 0.332ctルース

Johachidolite from Myanmar 0.332ct loose Sale price¥29,800
ミャンマー産バイカラースターサファイア 0.920ctルース

Bicolor star sapphire from Myanmar 0.920ct loose Sale price¥39,800
Paraiba tourmaline from Brazil 0.129ct loose (Cu:0.6%,MnO:0.9%)

Paraiba tourmaline from Brazil 0.129ct loose (Cu:0.6%,MnO:0.9%) Sale price¥29,800
Bicolor tourmaline 3.242ct rough stone from Afghanistan

Bicolor tourmaline 3.242ct rough stone from Afghanistan Sale price¥5,980
ザンビア産アメジスト 39.112ct原石

Amethyst 39.112ct raw stone from Zambia Sale price¥5,980
ザンビア産アメジスト 29.357ct原石

Amethyst 29.357ct raw stone from Zambia Sale price¥3,980
フィンランド産ラブラドライト（スペクトロライト） 6.335ctルース

Labradorite (Spectrolite) from Finland 6.335ct loose Sale price¥4,980
フィンランド産ラブラドライト（スペクトロライト） 5.261ctルース

Labradorite (Spectrolite) from Finland 5.261ct loose Sale price¥5,980
フィンランド産ラブラドライト（スペクトロライト） 4.747ctルース

Labradorite (Spectrolite) from Finland 4.747ct loose Sale price¥5,980
グリーントルマリン 0.389ctルース

Green tourmaline 0.389ct loose Sale price¥8,800
タンザニア産コーネルピン 0.173ctルース

Cornell pin from Tanzania 3.5mm/0.173ct loose Sale price¥8,800
See more list of new arrivals

《Products eligible for multiple purchase discount》

[Available at 10 PM on January 25th] Limited to 12 stones: Sakura in-cut and Lepidocrocite in-quartz gacha set (1 loose stone) [Multiple purchase discounts available]

[Available at 10 PM on January 25th] Limited to 12 stones: Sakura in-cut and Lepidocrocite in-quartz gacha set (1 loose stone) [Multiple purchase discounts available] Sale price¥3,580
[Limited to 24 stones] Oregon Sunstone from America with beautiful Schiller (Oval cut, 5 x 7mm) [Multiple purchase discount available]

[Limited to 24 stones] Oregon Sunstone from America with beautiful Schiller (Oval cut, 5 x 7mm) [Multiple purchase discount available] Sale price¥7,980
[Available at 10 PM on January 24th] Limited to 18 stones: Golden Hill Turquoise from Kazakhstan (December birthstone, average 1.3 carats) [Multiple purchase discounts available]

[Available at 10 PM on January 24th] Limited to 18 stones: Golden Hill Turquoise from Kazakhstan (December birthstone, average 1.3 carats) [Multiple purchase discounts available] Sale price¥2,980
[Available at 10 PM on January 1st] [Limited to 15 stones] Japanese Polishing Artisan Gacha 💎 Koshu Precious Stone Cut Glass, Shimizu Precious Stone, Polished by Takeshi Yamamoto [Multiple purchase discounts available]

[Available at 10 PM on January 1st] [Limited to 15 stones] Japanese Polishing Artisan Gacha 💎 Koshu Precious Stone Cut Glass, Shimizu Precious Stone, Polished by Takeshi Yamamoto [Multiple purchase discounts available] Sale price¥4,980
[Available at 10 PM on January 31st] [Limited Stock] Dominican Republic Conch Pearl & Shell Gacha Loose Stone, Including Rare Semi-White and Flame Patterns [Multiple Purchase Discounts Available]

[Available at 10 PM on January 31st] [Limited Stock] Dominican Republic Conch Pearl & Shell Gacha Loose Stone, Including Rare Semi-White and Flame Patterns [Multiple Purchase Discounts Available] Sale price¥3,980
[Available at 10 PM on January 30th] Limited to 6 Silky Pink Sapphires from Vietnam (Sanjay Cut, Round, 3.0-3.3mm) Gacha [Multiple Purchase Discounts Available]

[Available at 10 PM on January 30th] Limited to 6 Silky Pink Sapphires from Vietnam (Sanjay Cut, Round, 3.0-3.3mm) Gacha [Multiple Purchase Discounts Available] Sale price¥5,980
Limited to 20 stones: Brazilian Paraiba tourmaline (cabochon cut, approximately 2.2 mm) [Multiple purchase discounts available]

Limited to 20 stones: Brazilian Paraiba tourmaline (cabochon cut, approximately 2.2 mm) [Multiple purchase discounts available] Sale price¥9,800
Limited to 20 stones: 1 loose sphalerite stone from Spain. Discounts available for multiple purchases.

Limited to 20 stones: 1 loose sphalerite stone from Spain. Discounts available for multiple purchases. Sale price¥1,980
Limited to 14 stones: Brazilian dendritic quartz loose stone (average 7 carats) Multiple purchase discounts available

Limited to 14 stones: Brazilian dendritic quartz loose stone (average 7 carats) Multiple purchase discounts available Sale price¥2,980
Limited to 14 stones: Beryllium-heated sapphire (3.5mm, KEN cut) - 1 loose stone. Discounts available for multiple purchases.

Limited to 14 stones: Beryllium-heated sapphire (3.5mm, KEN cut) - 1 loose stone. Discounts available for multiple purchases. Sale price¥1,580
December Special Campaign: Limited to 14 stones. December birthstone: Tanzanite, loose stone (5x7mm, oval cut). Multiple purchase discounts available.

December Special Campaign: Limited to 14 stones. December birthstone: Tanzanite, loose stone (5x7mm, oval cut). Multiple purchase discounts available. Sale price¥8,800
Limited Edition of 12 Diamonds: VS Equivalent Fluorescent Diamond Gacha with Bonus Mini Slice Diamond (Multiple Purchase Discounts Available)

Limited Edition of 12 Diamonds: VS Equivalent Fluorescent Diamond Gacha with Bonus Mini Slice Diamond (Multiple Purchase Discounts Available) Sale price¥6,980
Limited to 32 stones: Namibian Mandarin Garnet, 1 loose stone (round cut, 2.5mm) [Multiple purchase discounts available]

Limited to 32 stones: Namibian Mandarin Garnet, 1 loose stone (round cut, 2.5mm) [Multiple purchase discounts available] Sale price¥5,980
Limited to 9 stones: 1 rough petalite stone from Myanmar (average 6.0 carats) Multiple purchase discounts available

Limited to 9 stones: 1 rough petalite stone from Myanmar (average 6.0 carats) Multiple purchase discounts available Sale price¥2,980
Limited to 7 stones: One loose colorless apatite from Madagascar (with appraisal certificate for each stone, average 0.60 carat) Discounts available for multiple purchases

Limited to 7 stones: One loose colorless apatite from Madagascar (with appraisal certificate for each stone, average 0.60 carat) Discounts available for multiple purchases Sale price¥4,980
Limited Quantity: Madagascar Neon Blue Apatite Rough Stone (Average 2.2ct) Multiple Purchase Discounts Available

Limited Quantity: Madagascar Neon Blue Apatite Rough Stone (Average 2.2ct) Multiple Purchase Discounts Available Sale price¥1,280
Limited to 3 stones: Indian Andesine and Labradorite (Rainbow Moonstone) Flower Carving, 6mm, 1 stone. Discounts available for multiple purchases.

Limited to 3 stones: Indian Andesine and Labradorite (Rainbow Moonstone) Flower Carving, 6mm, 1 stone. Discounts available for multiple purchases. Sale price¥3,980
Limited to 4 stones: Carving Gacha (pink tourmaline, average 3.4 carats) 1 loose stone (multiple purchase discounts available)

Limited to 4 stones: Carving Gacha (pink tourmaline, average 3.4 carats) 1 loose stone (multiple purchase discounts available) Sale price¥3,980
Limited to 8 stones: 1 loose synthetic alexandrite (custom cut by Mr. Sanjay, shield cut, octagonal cut, etc.) Discounts available for multiple purchases

Limited to 8 stones: 1 loose synthetic alexandrite (custom cut by Mr. Sanjay, shield cut, octagonal cut, etc.) Discounts available for multiple purchases Sale price¥6,980
Limited Stock: Single Russian Oil-Free Emerald Loose (2.1mm, Square Cut) - Multiple Purchase Discounts Available

Limited Stock: Single Russian Oil-Free Emerald Loose (2.1mm, Square Cut) - Multiple Purchase Discounts Available Sale price¥5,980
Limited to 10 stones: Tanzanite rough stone gacha including bicolor pink tanzanite rough stones (average 4.2 carats) [Multiple purchase discounts available]

Limited to 10 stones: Tanzanite rough stone gacha including bicolor pink tanzanite rough stones (average 4.2 carats) [Multiple purchase discounts available] Sale price¥6,980
Limited to 8 stones: Colombian mango quartz (up to 60 carats, average 21.6 carats) [Multiple purchase discounts available]

Limited to 8 stones: Colombian mango quartz (up to 60 carats, average 21.6 carats) [Multiple purchase discounts available] Sale price¥1,980
Limited Edition of 12: Brazilian Indigolite Tourmaline Loose Stone (4x3mm, Oval Cut) - Multiple Purchase Discounts Available

Limited Edition of 12: Brazilian Indigolite Tourmaline Loose Stone (4x3mm, Oval Cut) - Multiple Purchase Discounts Available Sale price¥4,980
Limited to 12 stones: Mexican opal (custom faceted cut) - 1 loose stone (multiple purchase discounts available)

Limited to 12 stones: Mexican opal (custom faceted cut) - 1 loose stone (multiple purchase discounts available) Sale price¥3,980
Limited to 11 stones: Sakura-shaped Contralus Opal and a specially cut Opal Gacha with one loose stone. Discounts available for multiple purchases.

Limited to 11 stones: Sakura-shaped Contralus Opal and a specially cut Opal Gacha with one loose stone. Discounts available for multiple purchases. Sale price¥3,980
Limited to 14 stones: Lab-grown diamond (cabochon cut, approximately 2.3mm) - 1 loose stone. Discounts available for multiple purchases.

Limited to 14 stones: Lab-grown diamond (cabochon cut, approximately 2.3mm) - 1 loose stone. Discounts available for multiple purchases. Sale price¥4,980
See more products eligible for multiple purchase discounts

Bungo and Alchemist

Sold out [Sales End on Sunday, February 1st] "Bungo and Alchemist" x KARATZ Collaboration Jewelry "Part 3" Bungo Ring [Oda Sakunosuke Model]

[Sales End on Sunday, February 1st] "Bungo and Alchemist" x KARATZ Collaboration Jewelry "Part 3" Bungo Ring [Oda Sakunosuke Model]

Sold out [Sales End on Sunday, February 1st] "Bungo and Alchemist" x KARATZ Collaboration Jewelry "Part 3" Writer's Ring [Edogawa Ranpo Model Ring]

[Sales End on Sunday, February 1st] "Bungo and Alchemist" x KARATZ Collaboration Jewelry "Part 3" Writer's Ring [Edogawa Ranpo Model Ring]

Sold out [Sales End on Sunday, February 1st] "Bungo and Alchemist" x KARATZ Collaboration Jewelry "Part 3" Bungo Ring [Kikuchi Kan Model Ring]

[Sales End on Sunday, February 1st] "Bungo and Alchemist" x KARATZ Collaboration Jewelry "Part 3" Bungo Ring [Kikuchi Kan Model Ring]

Sold out [Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}

[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}

Sold out [Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}

[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}

Sold out [Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}

[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}

Sold out [Sales End on Monday, June 30th] "Bungo and Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Izumi Kyoka Model]

[Sales End on Monday, June 30th] "Bungo and Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Izumi Kyoka Model]

Sold out [Sales End on Monday, June 30th] "Bungo and Alchemist" x KARATZ Collaboration Jewelry Literary Ring [Akutagawa Ryunosuke Model]

[Sales End on Monday, June 30th] "Bungo and Alchemist" x KARATZ Collaboration Jewelry Literary Ring [Akutagawa Ryunosuke Model]

Sold out [Sales End on Monday, June 30th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model]

[Sales End on Monday, June 30th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model]

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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.