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[On sale May 28th, 10 PM] Adult Sebonstar Jewelry Vol. 3: Heart Key Lock Pendant Precious Model (Platinum/Gold) Pt950/K18YG/K18PG

[On sale May 28th, 10 PM] Adult Sebonstar Jewelry Vol. 3: Heart Key Lock Pendant Precious Model (Platinum/Gold) Pt950/K18YG/K18PG Sale price¥198,000
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
インターナリーフローレスダイヤモンド（H&C） 5.1mm/0.527ctルース(E, IF, 3Excellent H&C)

[Lottery Sale 0530_06] Internally Flawless Diamond (H&C) 0.527ct Loose Stone (E, IF, 3Excellent H&C) Sale price¥228,000
インターナリーフローレスダイヤモンド 0.272ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA Sale price¥138,000
フローレスダイヤモンド（H&C） 0.290ctルース(D, FL, 3Excellent H&C)

【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
フローレスダイヤモンド（H&C） 4.2mm/0.280ctルース(D, FL, 3Excellent H&C) GIA&中宝

【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
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
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
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
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
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
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
ロイヤルブルーサファイア 0.730ctルース

Royal Blue Sapphire 0.730ct Loose AIGS Sale price¥158,000
Pt900ベニトアイト0.152ct・ダイヤモンド0.58ctリング

[Sale on 6/8 at 10 PM] Pt900 Benitoite 0.152ct / Diamond 0.58ct Ring Sale price¥188,000
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
スリランカ産アイオライト 14.158ctルース 日独鑑

[12552306] Iolite 14.158ct loose stone Sale price¥258,000
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
コロンビア産ノンオイルエメラルド 0.210ctルース

[On Sale June 7, 10 PM] 0.210ct Untreated Colombian Emerald Loose Stone, GIA Certified Sale price¥228,000
非加熱ブルーサファイア 2.430ctルース

[On sale June 7, 10 PM] Untreated Blue Sapphire 2.430ct Loose Gemstone GIA Sale price¥258,000
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 Setting" 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 End on Sunday, January 18th] Adult Sebon Star 1st Edition Pendant Precious Model (Pt950, K18YG, K18PG) Sale price¥198,000
[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} Sale priceFrom ¥25,800
[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} Sale priceFrom ¥25,800
セボンスター-×KARATZコラボ　リング　プレシャスモデル

[Sales End on Sunday, January 18th] Adult Sebonstar 1st Ring Precious Model (Pt950, K18YG, K18PG) Sale price¥198,000
[On sale May 28th at 10 PM] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Part 3: Bungo Ring [Sakunosuke Oda Model]

[On sale May 28th at 10 PM] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Part 3: Bungo Ring [Sakunosuke Oda Model] Sale priceFrom ¥25,800
[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} Sale priceFrom ¥25,800
【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
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
[On sale May 28th at 10 PM] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Vol. 4: Bungo Ring [Takiji Kobayashi Model Ring]

[On sale May 28th at 10 PM] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Vol. 4: Bungo Ring [Takiji Kobayashi Model Ring] Sale priceFrom ¥25,800
[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] Sale priceFrom ¥25,800
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¥178,000
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¥198,000
カンボジア産ブルージルコン（ラタナキリブルー） 23.105ctルース 鑑別書

[On Sale May 5th at 10 PM] Cambodian Blue Zircon (Ratanakiri Blue) 23.105ct Loose Stone with Appraisal Sale price¥498,000
エメラルド 15.219ctルース 日独鑑

Natural Emerald from Brazil, 15.219 ct, Loose Stone, Nichidoku Identification Report Sale price¥398,000
[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] Sale priceFrom ¥25,800
13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm)

13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm) Sale price¥158,000
Ainsel "Semi-custom ring setting"

Ainsel "Semi-custom ring setting" Sale price¥178,000
ロシア産デマントイドガーネット（ホーステール認む） 1.366ctルース

[Sales start June 5th, 10 PM] Russian Demantoid Garnet (horsetail inclusion visible) 6.8mm/1.366ct Loose Stone with Appraisal Report Sale price¥398,000
ロシア産デマントイドガーネット（ホーステール認む） 1.589ctルース

[On sale June 5th at 10 PM] Russian Demantoid Garnet (Horsetail inclusion confirmed) 6.9mm/1.589ct Loose Stone with Appraisal Report Sale price¥458,000
パープルダイヤモンド 0.048ctルース(FANCY VIVID PINK PURPLE, SI-1)

[On sale June 5th at 10 PM] Purple Diamond 0.048ct Loose Stone (FANCY VIVID PINK PURPLE, SI-1) CGL 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） 0.876ctルース

[On sale 6/5 at 10 PM] Russian Demantoid Garnet (horsetail inclusion visible) 5.8mm/0.876ct Loose Stone with Appraisal Report Sale price¥258,000
ミャンマー産マスグラバイト 0.351ctルース

[On sale May 31 at 10 PM] Myanmar Musgravite 0.351ct Loose Gemstone, Japan-Germany Sale price¥128,000
ブラジル産バイカラートルマリン 3.785ctルース

Brazilian Bi-Color Tourmaline 3.785ct Loose Stone [On sale May 27th, 10 PM JST] Sale price¥110,000
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
ブラジル産インペリアルトパーズ 3.999ctルース

[On sale May 20 at 10 PM] Brazilian Imperial Topaz 3.999 ct Loose Stone with Certificate Sale price¥188,000

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.