Product list

[Item 12564248] Madagascar Sapphire 0.385ct Loose Stone Sale price¥18,800

[Item 12564372] Mongolian Bicolor Andesine 2.399ct Loose Gemstone Sale price¥25,800

[Available 10/10 at 22:00] Brazilian Limonite-in-Topaz 3.194ct Loose Gemstone Sale price¥7,980

[Available 10/10 at 10 PM] Hemimorphite from Congo, 3.363ct loose stone Sale price¥18,800

[Available 10/10 at 10 PM] Brazilian Yellow Beryl 0.952ct Loose Gemstone Sale price¥14,800

[Available Oct 10, 10:00 PM] Madagascar Apatite 0.300ct Loose Stone Sale price¥8,800

[10/10 10:00 PM Release] Turkish Diopside 0.450ct Loose Stone Sale price¥9,800

[On sale 10/11 at 22:00] Burmese color-change zircon 0.249ct loose stone Sale price¥39,800

[Available 10/12 at 10 PM] Indian Iolite Sunstone 1.320ct Loose Gemstone Sale price¥9,800

[Available 10/12 at 10 PM] Indian Iolite Sunstone 1.225ct Loose Gemstone Sale price¥9,800

[Available Oct 12, 10 PM] Indian Iolite Sunstone 1.113ct Loose Gemstone Sale price¥11,800

[Available 10/12 at 10:00 PM] Indian Iolite Sunstone 1.064ct Loose Gemstone Sale price¥9,800

[Available Oct 11, 10 PM] Indian Iolite Sunstone 2.460ct Loose Gemstone Sale price¥11,000

[Available 10/11 at 10 PM] Indian Iolite Sunstone 1.084ct Loose Gemstone Sale price¥8,800

[10/11 10 PM Release] Indian Iolite Sunstone 7.0mm/1.232ct Loose Gemstone Sale price¥8,800

[On sale 10/12 at 22:00] Sri Lankan Uva Moonstone 0.740ct Loose Stone Sale price¥14,800

【Available 10/12 at 10:00 PM】 Pakistani Vayrynenite 0.075ct Loose Stone Sale price¥16,800

[Available 10/12 at 10 PM] Pakistani Vayrynenite 0.067ct Loose Gemstone Sale price¥14,800

[10/12 10 PM Release] Vayrynenite from Pakistan, 0.064ct Loose Gemstone Sale price¥14,800

[10/12 10 PM Release] Pakistani Väyrynenite 0.099ct Loose Gemstone Sale price¥22,800

[Available 10/12 at 10 PM] Tanzanian Sunstone (Illusion Sunstone) 4.124ct Loose Gemstone Sale price¥15,800

[10/12 10 PM Sale] Tanzanian Sunstone (Illusion Sunstone) 7.715ct Loose Stone Sale price¥24,800

[Available 10/12 at 10 PM] Tanzanian Sunstone (Illusion Sunstone) 2.888ct Loose Gemstone Sale price¥9,800

[10/11 10 PM Sale] Mozambique Aquamarine 3.541ct Loose Gemstone with Identification Report Sale price¥45,800

[Available 10/11 at 10 PM] Tanzanian Cobalt Spinel 2.3mm/0.070ct Loose Gemstone with Identification Report Sale price¥22,800

[Available 10/9, 10 PM] Tanzanian Cobalt Spinel 2.1mm / 0.053ct Loose Gemstone with Identification Report Sale price¥19,800

[10/9 10 PM Sale] Russian Non-Oiled Emerald 0.061ct Loose Stone Sale price¥35,800

[Item 12564461] Dominican Republic Larimar 3.420ct Loose Gemstone Sale price¥12,800

[Available 10/11 at 22:00] Colombian Trapiche Emerald 0.981ct Loose Gemstone with Appraisal Report Sale price¥58,800

[Item 12564459] Nepalese Kyanite 1.017ct Loose Gemstone Sale price¥9,800

[Item 12564471] Australian Boulder Opal 4.444ct Loose Gemstone Sale price¥17,800

[Item 12564612] Unheated Bicolor Sapphire from Windsor, Tanzania, 0.620ct Loose Gemstone Sale price¥75,800

[Item 22602808] [Colori] K18WG Diamond Pendant (Necklace) Sale price¥148,000

K18/K18WG イエローダイヤモンド0.30ct ダイヤモンド0.26ct ペンダント（ネックレス）

[Item No. 22602806] [Colorify] K18/K18WG 0.3ct Diamond and 0.26ct Diamond Pendant (Necklace) Sale price¥158,000

K18WG ダイヤモンド 0.5ct クロスモチーフペンダントトップ（ネックレストップ）

[Posted on 22602705] [Colorful] K18WG Diamond 0.5ct Pendant Top (Necklace Top) Sale price¥35,800

Pt900 ピンクサファイア 0.42ct ダイヤモンド 0.05ctリング日独鑑

[Item 22602811] [Coloriful] Pt900 Pink Sapphire 0.42ct Diamond 0.05ct Ring with Appraisal Report Sale price¥59,800

K18 揺れるダイヤモンド 0.211ct ダイヤモンド0.35ct ペンダント（ネックレス）

[Item 22602804][Colori] K18 0.211ct Diamond & 0.35ct Diamond Pendant (Necklace) Sale price¥158,000

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

[Lottery Sale ②_202608_04] Unheated Kashmir Sapphire 0.710ct Loose Stone GIA Sale price¥298,000

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

[Sat, Sep 5, 10:00 AM Deadline: Lottery Sale_10] Colombian Non-Oiled Emerald 0.290ct Loose Stone GIA Sale price¥178,000

[Ref: 12564102] Pink Sapphire from Sri Lanka, 0.142ct loose stone Sale price¥9,800

[12563017 listed] Pink Sapphire 0.143ct Loose Stone Sale price¥12,800

[Item 12564297] Phenakite from Malyshevo, Russia, 1.491ct Loose Stone Sale price¥53,800

[Ref: 12564306] Brazilian Emerald Cat's Eye 0.582ct Loose Gemstone Sale price¥22,800

ケニア産ケニア産ゴールドシーンサファイア（スターサファイア） 0.311ctルース

[Item 12564329] Kenyan Gold Sheen Sapphire (Star Sapphire) 0.311ct Loose Stone Sale price¥24,800

[Item 12564332] Kenyan Gold Sheen Sapphire 0.859ct Loose Gemstone Sale price¥59,800

[Available 10/4, 10:00 PM] Mongolian Andesine 8.1mm/1.935ct Loose Gemstone 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.