Width: 2.1 - 3.0mm

coming soon

[Listed as 12563740] Madagascar Grandidierite 0.171ct Loose Stone Sale price¥29,800

[On sale 7/12 at 10 PM] Colombian Emerald 0.135ct Loose Stone - Houki-kyo Sale price¥29,800

[12563393 listed] Tanzanian Red Spinel 0.098ct Loose Stone Sale price¥15,800

[12563374 Posted] Bicolor Euclase from Zimbabwe, 0.055ct Loose Stone Sale price¥14,800

[Item 12563407] Afghan Green Hauyne 0.075ct Loose Stone Sale price¥29,800

[Published 12562264] Brazilian Lazulite 0.048ct Loose Sale price¥36,800

グリーンダイヤモンド 0.100ctルース(VERY LIGHT GREEN, SI-1)

[On sale July 4th at 10 PM] Green Diamond 0.100ct Loose Stone (VERY LIGHT GREEN, SI-1, Old Cut) Sale price¥39,800

Paraiba tourmaline from Brazil 0.090ct loose Sale price¥69,800

Paraiba tourmaline from Brazil 0.056ct loose Sale price¥45,800

[On sale July 3 at 10 PM] Jeremejevite from Namibia, 0.103 ct loose stone, with certificate Sale price¥25,800

[On sale July 5th at 10 PM] Sri Lankan Blue Sapphire, 0.550 ct Loose Stone with Gemstone Report Sale price¥39,800

[On sale July 5th at 10 PM JST] Madagascar Grandidierite 2.8mm/0.086ct Loose Stone with Certification Sale price¥18,800

[On Sale July 5 at 10 PM JST] Madagascar Grandidierite 2.5mm/0.065ct Loose Stone with Certification Sale price¥15,800

[On sale July 5th at 10 PM] Colombian Emerald 0.147ct Loose Stone with Appraisal Sale price¥12,800

Russian rough diamond (sawable) 0.088ct loose Sale price¥19,800

Sri Lankan Yellow Sapphire 0.349ct Loose Sale price¥12,800

非加熱ブラジル産パライバトルマリン 0.068ctルース（CuO:1.7%、MnO:2.4%）

Unheated Brazilian Paraiba Tourmaline 0.068ct loose stone (CuO: 1.7%, MnO: 2.4%) Sale price¥45,800

Russian Diamond Rough (Sawable) 0.103ct Loose (Trigon) Sale price¥25,800

[On sale 7/4 10 PM] Madagascar Padparadscha Sapphire 0.221ct Loose Stone with Central Gem Lab certificate Sale price¥38,800

[On Sale June 27th, 10 PM] Madagascar Padparadscha Sapphire 0.186ct Loose Stone - Central Gemological Laboratory Sale price¥25,800

[On sale June 27th, 10 PM JST] Brazilian Lazulite 0.022ct Loose Stone with Certificate Sale price¥18,800

[Sale on 6/27 at 10 PM] Brazilian Lazulite (Lazulite) 0.067ct Loose Stone with Certificate Sale price¥49,800

[Sales start June 30th at 10 PM] Brazilian Lazulite 0.061ct Loose Stone with Gemstone Identification Report Sale price¥45,800

[On sale July 10th at 10 PM] Zimbabwe Eucrase 0.138ct Loose Gemstone with Certificate Sale price¥29,800

【12563372掲載】ジンバブエ産バイカラーユークレース 0.118ctルース

[Sales start July 6, 10 PM] Bicolor Euclase from Zimbabwe 0.118ct Loose Gemstone with Certificate Sale price¥25,800

Colombian mint color emerald 0.297ct loose stone Sale price¥8,800

[Updated 12552163] Benitoite 0.099ct loose stone Sale price¥29,800

【On Sale 6/25 10 PM JST】Euclase from Zimbabwe 0.070 ct Loose Stone with Certificate Sale price¥16,800

[Sale on June 25th at 10 PM] Zimbabwe Euclase 0.067ct Loose Stone with Certification Sale price¥15,800

[Sale on June 21 at 10 PM] Jeremejevite from Namibia 0.139ct Loose Stone with Certification Sale price¥29,800

[On sale June 21, 10 PM] Jeremejevite 0.089ct Loose Stone from Namibia with certificate Sale price¥25,800

[On sale June 26, 10 PM JST] Russian rough diamond (sawable) 0.148ct (trigon) Sale price¥49,800

Brazilian alexandrite 0.116ct loose Sale price¥15,800

Unheated Brazilian Paraiba Tourmaline 0.081ct loose stone (CuO: 2.1%, MnO: 2.3%) Sale price¥75,800

[On sale June 20 at 10 PM] Zimbabwe Rough Green Diamond (Sawable) 0.228ct Rough (Trigon) Sale price¥79,800

[On sale June 19, 10 PM] Colombian Trapiche Emerald 0.183ct Loose Stone Sale price¥39,800

[On sale June 17th at 10 PM] Canadian Eudialyte 2.4mm/0.052ct Loose Stone with Appraisal Sale price¥15,800

[On sale June 13th at 10 PM] Pakistani Lapis Lazuli (Lazurite) 0.103ct Loose Stone with Certification Sale price¥19,800

[On Sale June 20th, 10 PM JST] Myanmar Leuco Garnet 0.128ct Loose Stone with Appraisal Report Sale price¥25,800

【Sales start at 10 PM on June 21】Myanmar Leuco Garnet 0.108ct Loose Gemstone with Certificate Sale price¥22,800

[Available 6/18 10 PM JST] Botswana rough diamond (sawable) 0.118ct (trigon) Sale price¥29,800

[Available June 21 at 10 PM] Botswana Rough Diamond (Sawable) 0.087ct Rough (Trigon) Sale price¥21,800

[Sale June 15th 10 PM JST] Afghanistan Hauyne 0.098ct Loose Stone with Gemstone Identification Report Sale price¥25,800

[On sale June 6th, 10 PM JST] Nigerian Cobaltian Gahnite 0.122ct Loose Gemstone with Identification Report Sale price¥18,800

非加熱ブラジル産パライバトルマリン 0.065ctルース（CuO:1.6%、MnO:2.4%）

0.065ct loose Paraiba tourmaline from Brazil (CuO: 1.6%, MnO: 2.4%) Sale price¥49,800

American Red Beryl 0.132ct Loose Sale price¥33,800

South African diamond rough (sawable) 0.110ct rough Sale price¥22,800

American red beryl 0.143ct loose Sale price¥35,800

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.