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GIA

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coming soon [Lottery Sale: Friday, October 31st, 10:00 AM] Internally Flawless Diamond (H&C) 3.8mm/0.210ct Loose (F, IF, 3 Excellent H&C) GIA & Chuho
Sold out インターナリーダイヤモンド 0.25ルース(E, IF, 3Excellent) GIA
Sold out コロンビア産ノンオイルエメラルド(NONE) 0.110ctルース GIA
Sold out 非加熱ブラジル産パライバトルマリン 0.108ctルース
Sold out ノンオイルレッドベリル 0.200ctルース GIA
Sold out ノンオイルレッドベリル 2.5mm/0.050ctルース GIA
Sold out カシミール産非加熱サファイア 0.200ctルース
Sold out カシミール産非加熱サファイア 0.080ctルース
Sold out カシミール産非加熱サファイア 0.080ctルース
Sold out サファイア 0.890ctルース
Sold out 非加熱パパラチアサファイア 3.9mm/0.290ctルース GIA
Sold out Unheated blue sapphire from Madagascar 1.310ct loose GIA
Sold out パパラチアサファイア 0.240ctルース
Sold out ノンオイルレッドベリル 0.21ctルース GIA
Sold out スリランカ産非加熱サファイア 1.550ctルース
Sold out フローレスダイヤモンド(H&C) 4.0mm/0.224ctルース(D, FL, 3Excellent H&C) GIA&中宝
Sold out Ethiopian oil-free emerald 0.32ct loose GIA
Sold out ロシア産ノンオイルエメラルド 0.840ctルース GIA
Sold out Fancy Deep Yellowish Green Diamond (Treatment) 1.570ct Loose (FANCY DEEP YELLOWISH GREEN, VS2) GIA
Sold out コロンビア産ノンオイルエメラルド 0.170ctルース
Sold out アイスブルーダイヤモンド 3.0mm/0.090ctルース(Undetermined) GIA
Sold out ピジョンブラッドルビー 0.940ctルース
Sold out 非加熱コバルトスピネル(コバルトブルースピネル) 0.740ctルース(シールドカット) GIA
Sold out Internally Flawless Diamond 3.7mm/0.200ct Loose (E, IF, 3Excellent H&C) GIA & Chuho

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.