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ブラジル産パライバトルマリンインクォーツ 0.284ctルース

Brazilian Paraiba Tourmaline in Quartz 4.5mm/0.284ct Loose Stone Sale price¥19,800
[Item 12564676] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.394ct Loose Stone

[Item 12564676] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.394ct Loose Stone Sale price¥49,800
[12565160] Tsavorite from Kenya, 0.439ct loose stone

[12565160] Tsavorite from Kenya, 0.439ct loose stone Sale price¥29,800
[12565159] Tsavorite from Kenya, 0.314ct loose stone

[12565159] Tsavorite from Kenya, 0.314ct loose stone Sale price¥18,800
[10/18 10:00 PM Release] Tanzanian Mandarin Garnet 4.5mm/0.529ct Loose Stone with Identification Report

[10/18 10:00 PM Release] Tanzanian Mandarin Garnet 4.5mm/0.529ct Loose Stone with Identification Report Sale price¥29,800
[Item 12565145] Bekily Blue Garnet (Color Change Garnet) from Madagascar, 0.231ct loose stone

[Item 12565145] Bekily Blue Garnet (Color Change Garnet) from Madagascar, 0.231ct loose stone Sale price¥22,800
[Item 12564624] Tanzanian Cobalt Spinel 0.094ct Loose Gemstone

[Item 12564624] Tanzanian Cobalt Spinel 0.094ct Loose Gemstone Sale price¥47,800
Mozambique Almandine Garnet 1.144ct Loose Stone

Mozambique Almandine Garnet 1.144ct Loose Stone Sale price¥15,800
[Deadline: Sat, Oct 3, 10 AM: Lottery Sale ①_07] Internally Flawless Diamond (H&C) 0.320ct Loose Stone (D, IF, 3Excellent H&C) GIA & CGL Certified

[Deadline: Sat, Oct 3, 10 AM: Lottery Sale ①_07] Internally Flawless Diamond (H&C) 0.320ct Loose Stone (D, IF, 3Excellent H&C) GIA & CGL Certified Sale price¥148,000
[10/3 (Sat) 10:00 AM Deadline: Lottery Sale ①_02] Diamond (H&C) 4.3mm/0.318ct Loose Stone (H, SI-1, 3Excellent H&C) with CGL Certificate & Sarine Light Report

[10/3 (Sat) 10:00 AM Deadline: Lottery Sale ①_02] Diamond (H&C) 4.3mm/0.318ct Loose Stone (H, SI-1, 3Excellent H&C) with CGL Certificate & Sarine Light Report Sale price¥45,800
インド産アイオライトサンストーン 1.232ctルース

[10/11 10 PM Release] Indian Iolite Sunstone 7.0mm/1.232ct Loose Gemstone Sale price¥8,800
スリランカ産ムーンストーン 0.798ctルース

[Available Oct 15 at 10 PM] Sri Lankan Uva Moonstone 6.2mm/0.798ct Loose Gemstone Sale price¥12,800
スリランカ産ムーンストーン 0.755ctルース

[On sale 10/15 at 22:00] Moonstone from Uva, Sri Lanka, 6.2mm/0.755ct loose stone Sale price¥12,800
[10/13 10:00 PM Release] Tanzanian Cobalt Spinel 2.7mm/0.100ct Loose Stone with Identification Report

[10/13 10:00 PM Release] Tanzanian Cobalt Spinel 2.7mm/0.100ct Loose Stone with Identification Report Sale price¥39,800
タンザニア産コバルトスピネル 0.070ctルース

[Available 10/11 at 10 PM] Tanzanian Cobalt Spinel 2.3mm/0.070ct Loose Gemstone with Identification Report Sale price¥22,800
タンザニア産コバルトスピネル 0.053ctルース

[Available 10/9, 10 PM] Tanzanian Cobalt Spinel 2.1mm / 0.053ct Loose Gemstone with Identification Report Sale price¥19,800
インターナリーフローレスダイヤモンド（H&C） 4.2mm/0.280ctルース(D, IF, 3Excellent H&C) GIA&中宝

[Lottery Sale_12] [For Winners Only] [Ref: 32501798] Internally Flawless Diamond (H&C) 4.2mm/0.280ct Loose Stone (D, IF, 3Excellent H&C) GIA Sale price¥138,000
インターナリーフローレスダイヤモンド（H&C） 4.7mm/0.413ctルース(D, IF, 3Excellent H&C)　GIA

【10/5 10:00 PM Release】Internally Flawless Diamond (H&C) 4.7mm / 0.413ct Loose Stone (D, IF, 3Excellent H&C) GIA & CGL Certified Sale price¥178,000
スリランカ産ピンクサファイア 0.142ctルース

[Ref: 12564102] Pink Sapphire from Sri Lanka, 0.142ct loose stone Sale price¥9,800
モンゴル産アンデシン 1.935ctルース

[Available 10/4, 10:00 PM] Mongolian Andesine 8.1mm/1.935ct Loose Gemstone Sale price¥18,800
タンザニア産コバルトスピネル 3.6mm/0.187ctルース 日独産地鑑別

[Available 10/3 at 10 PM] Tanzanian Cobalt Spinel 3.6mm/0.187ct Loose Stone, JGL Origin Report Included Sale price¥98,000
アフガニスタン産アウイナイト 0.095ctルース

[10/3 10 PM Sale] Afghan Hauyne 0.095ct Loose Gemstone Sale price¥18,800
モンゴル産カラーチェンジアンデシン 1.327ctルース

[10/10 10:00 PM Release] Mongolian Color-Change Andesine 7.0mm/1.327ct Loose Gemstone Sale price¥14,800
コロンビア産雲母インエメラルド 0.249ctルース

【Available 10/3 at 10 PM】 Colombian Mica-in-Emerald 4.2mm/0.249ct Loose Gemstone with Certificate of Authenticity Sale price¥22,800
スリランカ産ピンクサファイア 4.1mm/0.354ctルース 鑑別書

[Available 10/2 at 10 PM] Sri Lankan Pink Sapphire 4.1mm/0.354ct Loose Gemstone with Appraisal Report Sale price¥22,800
ブラジル産カラーシフトアメジスト 7.7mm/1.607ctルース

[Oct 8, 10 PM Release] Brazilian Color-Shift Amethyst 7.7mm/1.607ct Loose Stone Sale price¥9,800
スリランカ産スピネル 3.419ctルース

[Deadline: 9/5 (Sat) 10 AM: Lottery Sale_11] Sri Lankan Blue Spinel 3.419ct Loose Stone with Identification Report Sale price¥158,000
マダガスカル産ロイヤルブルーサファイア 4.0mm/0.377ctルース 鑑別書

[Deadline: Mon, 9/14, 10:00 AM: Lottery Sale_07] Madagascar Royal Blue Sapphire 4.0mm/0.377ct Loose Stone with Identification Report Sale price¥69,800
非加熱ピジョンブラッドルビー 0.510ctルース

[Item 12561430] Unheated Pigeon Blood Ruby 0.510ct Loose Stone Sale price¥89,800
アメリカ産オレゴンサンストーン 1.093ctルース

[9/27 10:00 PM Release] Oregon Sunstone (USA) 6.9mm/1.093ct Loose Gemstone Sale price¥29,800
アメリカ産オレゴンサンストーン 1.094ctルース

[9/27 10:00 PM Release] Oregon Sunstone (USA) 6.9mm/1.094ct Loose Gemstone Sale price¥39,800
モンゴル産アンデシン 1.236ctルース

[Available 10/9 at 10 PM] Mongolian Andesine 7.0mm/1.236ct Loose Gemstone Sale price¥12,800
ピジョンブラッドルビー 0.220ctルース

[Available 9/25, 10 PM] Pigeon Blood Ruby 3.6mm/0.220ct Loose Gemstone AIGS Sale price¥49,800
インドネシア産パラサイティックペリドット 0.268ctルース

[9/25 10 PM Release] Indonesian Parasitic Peridot 3.8mm/0.268ct Loose Gemstone, NGL Certified Sale price¥128,000
ブラジル産ゴーシェナイト 0.376ctルース

[9/18 10 PM Sale] Brazilian Goshenite 4.3mm/0.376ct Loose Gemstone Sale price¥6,980
スリランカ産グリーンジルコン 0.474ctルース

[Available 9/26, 10:00 PM] Sri Lankan Green Zircon 4.5mm/0.474ct Loose Gemstone Sale price¥9,800
マダガスカル産パパラチアサファイア 3.6mm/0.281ctルース DGL鑑

【9/20 22:00 Release】 Madagascar Padparadscha Sapphire 3.6mm/0.281ct Loose Stone, DGL Certified Sale price¥35,800
チェコ産アラゴナイト 2.082ctルース

Czech Aragonite 8.0mm/2.082ct Loose Stone Sale price¥59,800
スペイン産スファレライト 2.796ctルース

Spanish Sphalerite 8mm/2.796ct loose stone Sale price¥69,800
【12549435掲載】ハーキマーダイヤモンド 0.516ctルース

American Herkimer Diamond 5.6mm/0.516ct Loose Sale price¥8,800
YAG（イットリウムアルミニウムガーネット） 1.686ctルース

YAG (Yttrium Aluminum Garnet) 7mm/1.686ct Loose Stone Sale price¥12,800
[202608GIA Appraisal Request] [Sale on June 5th at 10 PM] Russian Demantoid Garnet (with horsetail inclusion) 5.8mm/0.876ct Loose Stone with Appraisal Report

[202608GIA Appraisal Request] [Sale on June 5th at 10 PM] Russian Demantoid Garnet (with horsetail inclusion) 5.8mm/0.876ct Loose Stone with Appraisal Report Sale price¥258,000
Russian Demantoid Garnet (Horsetail Recognized) 5.1mm/0.664ct Loose Stone

Russian Demantoid Garnet (Horsetail Recognized) 5.1mm/0.664ct Loose Stone Sale price¥228,000
[202608GIA Appraisal Request] Russian Demantoid Garnet (horsetail inclusion confirmed) 5.2mm/0.661ct Loose Stone

[202608GIA Appraisal Request] Russian Demantoid Garnet (horsetail inclusion confirmed) 5.2mm/0.661ct Loose Stone Sale price¥248,000
カンボジア産ブルージルコン（ラタナキリブルー） 3.363ctルース

[Lottery Sale 0829] Cambodian Blue Zircon (Ratanakiri Blue) 3.363ct Loose Gemstone Sale price¥98,000
スリランカ産グリーンジルコン 0.424ctルース

[Available 9/29 at 10 PM] Sri Lankan Green Zircon 4.2mm/0.424ct Loose Gemstone Sale price¥8,800
タンザニア産サンストーン（イリュージョンサンストーン） 6.3mm/0.762ctルース

【9/11 10 PM Release】 Tanzanian Sunstone (Illusion Sunstone) 6.3mm/0.762ct Loose Gemstone Sale price¥9,800
ジンバブエ産バイカラーユークレース 0.075ctルース

[On sale 9/13 at 22:00] Bi-color Euclase from Zimbabwe, 0.075ct loose stone with identification report Sale price¥18,800

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.