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Sold out [Sales start at 11:00 AM on Friday, March 13th] Anime "Hell Teacher Nube" x Jewelry Specialty Store KARATZ Collaboration "Demon Hand Figure" Silver Model (Limited to 24 pieces)

[Sales start at 11:00 AM on Friday, March 13th] Anime "Hell Teacher Nube" x Jewelry Specialty Store KARATZ Collaboration "Demon Hand Figure" Silver Model (Limited to 24 pieces)

Sold out ラベンダー翡翠（ヒスイ） 78.496ctルース 中宝

Lavender Jade (Jade) 78.496ct Loose Medium Treasure
Sold out オーストラリア産ボルダーオパール 52.582ctルース

Australian boulder opal 52.582ct loose

Sold out 【5/24 22時販売】リボンの騎士×KARATZコラボ◆連載開始70周年記念ジュエリー◆ネックレス - カラッツSTORE

[Limited to 70 items] Ribbon Knight x KARATZ collaboration ◆ 70th anniversary commemorative jewelry ◆ Necklace

Sold out 【さくらインカット】オレゴンサンストーン 1.55ctルース - カラッツSTORE

[Sakura Incut] Oregon Sunstone 1.55ct Loose

Sold out Brazilian Alexandrite 0.290ct Loose Stone GIA

Brazilian Alexandrite 0.290ct Loose Stone GIA

Sold out K18WG ローズカットダイヤモンド 0.27ctリング 鑑別書

【On Sale July 20 at 10 PM】K18WG Rose-Cut Diamond 0.27ct Ring with Certificate
Sold out [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

Sold out ボリビア産フォスフォフィライト 0.559ctルース

[Lottery Sale 0428_2_13] Bolivian Phosphophyllite 0.559ct Loose Stone with Gemstone Identification Report

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
Sold out 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
Sold out 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
Sold out ブラジル産バイカラーパライバトルマリン 0.190ctルース

Brazilian Bi-color Paraiba Tourmaline 0.190ct Loose (CuO: 2.06% MnO: 1.31%) with Japan-Germany Gemological Analysis Report

Sold out 0.320 ct Sri Lankan Alexandrite Loose Stone, GIA

0.320 ct Sri Lankan Alexandrite Loose Stone, GIA

Sold out [On sale at 10 PM on June 8th] Pt900 Benitoite 0.135ct and Diamond 0.26ct Ring

[On sale at 10 PM on June 8th] Pt900 Benitoite 0.135ct and Diamond 0.26ct Ring
Sold out Benitoite 0.338ct loose stone

Benitoite 0.338ct loose stone
Sold out ピンクダイヤモンド（クッションカット） 0.157ctルース(FANCY DEEP PUPPLE PINK, I1)

Pink Diamond (Cushion Cut) 0.157ct Loose (FANCY DEEP PURPLISH PINK, I1)

Sold out マダガスカル産バイカラースフェーン 4.494ctルース

Madagascar Bi-color Sphene 4.494ct Loose Stone

Sold out 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]
Sold out Non-Oil Emerald 0.555ct Loose Stone by Nikkei

Non-Oil Emerald 0.555ct Loose Stone by Nikkei
Sold out Pt900 ブラジル産パライバトルマリン 0.11ct リング

【Sale starts 5/26 at 10 PM JST】[Colorful] Pt900 Paraiba Tourmaline from Brazil 0.11ct / Diamond 0.58ct Ring (CuO: 2.4%, MnO: 0.9%)

Sold out Flawless Diamond (H&C) 4.0mm/0.266ct Loose (D, FL, 3 Excellent H&C) GIA & Chuhokan

Flawless Diamond (H&C) 4.0mm/0.266ct Loose (D, FL, 3 Excellent H&C) GIA & Chuhokan
Sold out 【32501905掲載】ブルーダイヤモンド（トリートメント） 0.801ctルース(FANCY INTENSE GREEN BLUE, SI-2)

Sky Blue Diamond (Treated) 0.801ct Loose Stone (FANCY INTENSE GREEN BLUE, SI-2) Certificate

Sold out インターナリーフローレスダイヤモンド（H&C） 0.300ctルース(D, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 4.3mm/0.300ct Loose (D, IF, 3Excellent H&C) GIA&CGL

Sold out フローレスダイヤモンド（H&C） 0.230ctルース(D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 4.0mm/0.230ct Loose (D, FL, 3Excellent H&C) GIA & Central Gem Laboratory

Sold out 【32501881掲載】インターナリーフローレスダイヤモンド（H&C） 0.340ctルース(F, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 4.5mm/0.340ct Loose (F, IF, 3Excellent H&C) GIA & CBT

Sold out ボリビア産フォスフォフィライト 0.448ctルース

Bolivian Phosphophyllite 0.448ct Loose Stone with Certificate

Sold out コロンビア産パイライトインエメラルド 2.780ctルース

Colombian Pyrite Inclusion Emerald 2.780ct Loose Rare Stone [Limited to 1 pc] ¥198,000 12562799

Sold out K18/Pt950グリーンアウイナイト0.162ct リング

K18/Pt950 Afghanistan Green Apatite 0.162ct Ring
Sold out Pt900 カンテラオパール 7.809ctct リング

【Karafuri】Pt900 Cantera Opal 7.809ct and Diamond 0.19ct Pendant Top
Sold out ピンクダイヤモンド 0.060ctルース(FANCY INTENSE PINK, VS-2)

Pink Diamond 0.060ct Loose (FANCY INTENSE PINK, VS-2) CBT

Sold out 【12562747掲載】マダガスカル産非加熱ティールグリーンサファイア 1.740ctルース

Madagascar Unheated Teal Green Sapphire 1.74ct Loose GIA

Sold out Indian Alexandrite Cat's Eye 1.03ct Loose GIA

Indian Alexandrite Cat's Eye 1.03ct Loose GIA

Sold out ブラジル産パーティカラーパライバトルマリン 0.260ctルース

0.260ct Loose Parti-Color Paraiba Tourmaline from Brazil

Sold out K18YG ブラジル産パライバトルマリン 0.064ct リング

K18YG Brazilian Paraiba Tourmaline 0.064ct Ring (CuO:1.9%, MnO:2.4%)

Sold out 0.430ct Unheated Sapphire Loose Stone from Kashmir

0.430ct Unheated Sapphire Loose Stone from Kashmir

Sold out 【12562701掲載】ブラジル産バイカラートルマリン 4.554ctルース

Brazilian Bicolor Tourmaline 4.554ct Loose Stone with Certification

Sold out Colombian No-Oil Emerald 0.120ct Loose Stone GIA

Colombian No-Oil Emerald 0.120ct Loose Stone GIA
Sold out ボリビア産フォスフォフィライト 0.512ctルース

Bolivian Phosphophyllite 0.512ct Loose Gemstone with Certificate

Sold out ボリビア産フォスフォフィライト 0.300ctルース

Bolivian phosphophyllite, 0.300ct loose stone, with鑑別書

Sold out [Sales End April 30 (Thu)] Anime "Overlord" x KARATZ Jewelry Store Collaboration Shalltear [Spuitrans] Figurine《Limited Quantity》

[Sales End April 30 (Thu)] Anime "Overlord" x KARATZ Jewelry Store Collaboration Shalltear [Spuitrans] Figurine《Limited Quantity》

Sold out 18K Yellow Gold Colombian Emerald Ring

18K Yellow Gold Colombian Emerald Ring
Sold out Pink diamond 0.070ct loose (FANCY INTENSE PURPLE PINK, I1)

Pink diamond 0.070ct loose (FANCY INTENSE PURPLE PINK, I1)
Sold out 0.085ct loose, non-oil red beryl from the United States, GIA

0.085ct loose, non-oil red beryl from the United States, GIA

Sold out K18YG Russian Demantoid Garnet (horsetail inclusion) 4mm/0.382ct, Bekily Blue Garnet Ring

K18YG Russian Demantoid Garnet (horsetail inclusion) 4mm/0.382ct, Bekily Blue Garnet Ring
Sold out K18YG ベニトアイト 0.342ct リング

18K Yellow Gold American Benitoite 0.342ct Brazilian Paraiba Tourmaline Ring

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.