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ロシア産デマントイドガーネット（ホーステール認む） 1.058ctルース

Russian demantoid garnet (horsetail recognized) 6.3mm/1.058ct loose Sale price¥398,000

[On Sale at 10 PM on December 6th] Indonesian Parasitic Peridot 3.8mm/0.267ct Loose Stone Sale price¥128,000
[12/22 22:00] Sri Lankan Star Sapphire 12.679ct Loose

[12/22 22:00] Sri Lankan Star Sapphire 12.679ct Loose Sale price¥158,000
[12/21 22:00] Brazilian Bicolor Tourmaline 7.268ct Loose Stone

[12/21 22:00] Brazilian Bicolor Tourmaline 7.268ct Loose Stone Sale price¥158,000
[12/21 22:00] Zambian Bicolor Tourmaline 6.536ct Loose Stone

[12/21 22:00] Zambian Bicolor Tourmaline 6.536ct Loose Stone Sale price¥128,000
【32501524掲載】ピンクダイヤモンド 0.070ctルース(FANCY VIVID PINK PURPLE, I-1)

Purple Diamond 0.070ct Loose (FANCY VIVID PINK PURPLE, I-1) Sale price¥188,000
パキスタン産カラーチェンジスフェーン 7.137ctルース

Color change sphene from Pakistan 7.137ct loose Sale price¥198,000
[Listed at Shinjuku Marui Annex 202511] [Available at 10:00 PM on December 5th] 18K Yellow Gold Burmese Pink Spinel 3.9mm/0.276ct Hot Pink Spinel Ring

[Listed at Shinjuku Marui Annex 202511] [Available at 10:00 PM on December 5th] 18K Yellow Gold Burmese Pink Spinel 3.9mm/0.276ct Hot Pink Spinel Ring Sale price¥128,000
[Sales start at 10 PM on Wednesday, December 10th] Sebon Star Jewelry for Adults, Part 3: Sebon Star Pendant for Adults, Mirage Edition (Silver Model/Precious Model)

[Sales start at 10 PM on Wednesday, December 10th] Sebon Star Jewelry for Adults, Part 3: Sebon Star Pendant for Adults, Mirage Edition (Silver Model/Precious Model) Sale priceFrom ¥29,800
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

Solo (Simple Order Ring Frame) Sale priceFrom ¥79,800
セボンスター-×KARATZコラボ　ペンダント　プレシャスモデル

[Sales start at 10 PM on Wednesday, December 10th] Adult Sebon Star 1st Edition Pendant Precious Model (Pt950, K18YG, K18PG) Sale price¥198,000
Sales begin on Friday, December 12th at 10:00 PM. "Initial D" x KARATZ 30th Anniversary Pure Gold Coin (Limited to 86 pieces) & Pure Silver Coin (Limited to 860 pieces)

Sales begin on Friday, December 12th at 10:00 PM. "Initial D" x KARATZ 30th Anniversary Pure Gold Coin (Limited to 86 pieces) & Pure Silver Coin (Limited to 860 pieces) Sale priceFrom ¥39,800
セボンスター-×KARATZコラボ　リング　プレシャスモデル

[Sales start at 10 PM on Wednesday, December 10th] Sebonstar for Adults, first release: Ring Precious Model (Pt950, K18YG, K18PG) Sale price¥198,000
【石から選ぶセミオーダーペンダント枠】アンドロメダ（チェーン一体型）

Andromeda "Semi-custom pendant frame and chain integrated" Sale price¥105,800
Final Sale: SoftBank Hawks 20th Anniversary Pure Gold Oval Coins (10g, limited to 200 of each)

Final Sale: SoftBank Hawks 20th Anniversary Pure Gold Oval Coins (10g, limited to 200 of each) Sale priceFrom ¥398,000
2石から選ぶオーダーメイド《リング》申し込みページ～ Duo(デュオ) ～ - カラッツSTORE

Duo (Simple Order Ring Frame) Sale price¥105,800
[Sales start at 10 PM on Friday, November 21st] New Anime "Hell Teacher Nube" x KARATZ Collaboration Jewelry Demon Hand Pendant

[Sales start at 10 PM on Friday, November 21st] New Anime "Hell Teacher Nube" x KARATZ Collaboration Jewelry Demon Hand Pendant Sale priceFrom ¥24,800
ブラジル産パライバトルマリンリング・ハーフエタニティリングセット（1.2mm）

Brazilian Paraiba Tourmaline Ring and Half Eternity Ring Set (1.2mm) Sale price¥188,000
Top Quality: Benitoite 7 Stones and Diamond 6 Stones (H&C) Half Eternity Ring Set (2.0mm)

Top Quality: Benitoite 7 Stones and Diamond 6 Stones (H&C) Half Eternity Ring Set (2.0mm) Sale price¥158,000
コロンビア産パイライトインエメラルド 4.592ctルース

Colombian pyrite in emerald 4.592ct loose Sale price¥110,000
ブラジル産アンダリュサイト 7.656ctルース

[11/16 22:00 Sale] Brazilian Andalusite 7.656ct Loose Stone Sale price¥158,000
Bicolor tourmaline 22.088ct loose

Bicolor tourmaline 22.088ct loose Sale price¥298,000
アメリカ産ノンオイルレッドベリル 0.060ctルース GIA

[11/10 22:00 Sale] Oil-free American red beryl 0.060ct loose GIA Sale price¥128,000
マダガスカル産シルキーピンクサファイア 1.050ctルース GIT

[11/10 22:00 Sale] Silky Pink Sapphire from Madagascar 1.050ct Loose GIT Sale price¥128,000
コロンビア産ノンオイルエメラルド 0.290ctルースGIA

Colombian oil-free emerald 0.290ct loose GIA Sale price¥188,000
タンザニア産ウルツァイト 0.567ctルース 日独鑑

[11/1 22:00 Sale] Tanzanian Wurtzite 0.567ct Loose Stone, Japan-Germany Qualification Sale price¥198,000
コロンビア産ノンオイルエメラルド 0.220ctルース

[On Sale 11/23 10pm] Colombian Oil-Free Emerald 0.220ct Loose GIA Sale price¥298,000
[Shinjuku Marui Annex 202511] Unheated Pigeon Blood Ruby from Myanmar, 0.640ct, Loose, AIGS

[Shinjuku Marui Annex 202511] Unheated Pigeon Blood Ruby from Myanmar, 0.640ct, Loose, AIGS Sale price¥258,000
バイカラートルマリン 5.825ctルース

Bicolor tourmaline 5.825ct loose Sale price¥128,000
アメリカ・デトロイトシティ産ロードクロサイト 1.884ctルース

Rhodochrosite 1.884ct loose from Detroit City, USA Sale price¥188,000
Parasite Peridot (Paracytic Peridot) 0.541ct Loose Japanese-German Edition

Parasite Peridot (Paracytic Peridot) 0.541ct Loose Japanese-German Edition Sale price¥256,000
バイカラーベニトアイト 0.194ctルース（スクエアカット）

Bicolor Benitoite 0.194ct loose (square cut) Sale price¥128,000
コロンビア産パイライトインエメラルド 7.836ctルース

Colombian pyrite in emerald 7.836ct loose Sale price¥398,000
K18PG ブラジル産パライバトルマリン 0.49ct リング

18K Gold Plated Brazilian Paraiba Tourmaline 0.49ct Paraiba Tourmaline Ring GIA Sale price¥198,000
K18YG アメリカ産オレゴンサンストーン 0.44ct・ピンクダイヤモンド・オレンジスピネル リング

18K Yellow Gold American Oregon Sunstone 0.44ct, Pink Diamond, Orange Spinel Ring Sale price¥158,000
K18PGカナリーイエローダイヤモンド（トリートメント）0.214ct・アレキサンドライトリング 中宝付

[Shinjuku Marui Annex 202511] 18KPG Canary Yellow Diamond (Treatment) 0.214ct (SI-1, Fancy Intense Greenish Yellow) and Alexandrite Ring Sale price¥128,000
アメリカ産ベニトアイト 0.185ctルース

American Benitoite 0.185ct Loose Stone Sale price¥128,000
アメリカ産ベニトアイト 0.175ctルース

American Benitoite 0.175ct Loose Stone Sale price¥128,000
[Shinjuku Marui Annex 202511] Tanzanian kornerupine (total 1.151ct) 9-stone half eternity ring set (3.0mm)

[Shinjuku Marui Annex 202511] Tanzanian kornerupine (total 1.151ct) 9-stone half eternity ring set (3.0mm) Sale price¥128,000
[Shinjuku Marui Annex 202511] Tanzanian Kornerupine (total 1.103ct) 9-stone half eternity ring set (3.0mm)

[Shinjuku Marui Annex 202511] Tanzanian Kornerupine (total 1.103ct) 9-stone half eternity ring set (3.0mm) Sale price¥118,000
非加熱ブラジル産パライバトルマリン 0.170ctルース

Brazilian Paraiba tourmaline 0.170ct loose stone (CuO: 2.1%, MnO: 1.1%) Sale price¥198,000
ロシア産デマントイドガーネット（ホーステール認む） 0.487ctルース

[Shinjuku Marui Annex 202511] Russian Demantoid Garnet (Horsetail Certified) 0.487ct Loose Sale price¥110,000
ロシア産エメラルド 0.387ctルース

Russian Emerald 0.387ct Loose Stone (F1, Minor Enhancement) GIA Sale price¥128,000
ロシア産エメラルド 0.282ctルース

Russian Emerald 0.282ct Loose Stone (F1, Minor Enhancement) GIA Sale price¥128,000
アメリカ産ベニトアイト 0.262ctルース

American Benitoite 0.262ct loose stone Sale price¥128,000
ブラジル産アクアマリン 8.858ctルース

Brazilian Aquamarine 8.858ct Loose Stone Sale price¥198,000
コンゴ産ヘミモルファイト 64.144ctルース

[Posted 12543723] Hemimorphite 64.144ct loose Sale price¥198,000
グリーンゾイサイト 3.617ctルース

Green Zoisite 3.617ct loose Sale price¥118,000

KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

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 Books

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.