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gray/gray gemstones

Gemstones that exhibit gray or gray hues include gray diamonds, gray spinels (platinum spinels), gray sapphires, and other gemstones that contain gray inclusions, such as platinum rutilated quartz. It has a chic and calm atmosphere, and gives off a unique charm that is different from jewelry with gorgeous colors.

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Sapphire 0.461ct loose stone Sale price¥15,800

Diamond rough stone 0.967ct Sale price¥5,980

Diamond rough stone 1.293ct Sale price¥5,980

Zoisite 1.290ct loose stone Sale price¥19,800

Sold out グレーダイヤモンド 0.214ctルース
Sold out マダガスカル産ベキリーブルーガーネット(カラーチェンジガーネット) 0.139ctルース
Sold out オーストラリア産ブラックオパール 0.357ctルース
Sold out オーストラリア産ブラックオパール 0.679ctルース
Sold out オーストラリア産オパール 0.246ctルース
coming soon 【12557964掲載】スペイン産アンダリュサイト 0.835ctルース
Sold out マダガスカル産ラブラドライト 1.44ctルース
Sold out インド産ムーンストーン 2.720ctルース
Sold out ミャンマー産マスグラバイト 0.090ctルース GLT鑑
Sold out シェルオパール(貝オパール) 74.153ct原石
Sold out Green Zoisite 0.998ct Loose Stone
Sold out バイカラートルマリン 0.961ctルース
Sold out スピネル 0.323ctルース

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.