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Width: 4.1 - 5.0mm

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coming soon [Lottery Sale 0731_10] Colombian Muzo Non-Oil Emerald 0.370ct Loose GIA
coming soon 【12564039掲載】ビルマ産非加熱ジェダイスピネル 0.490ctルース
coming soon [Lottery Sale 0818_06] Madagascar Royal Blue Sapphire 0.623ct Loose Stone with Certificate
coming soon 【9/4(金)AM10時〆:抽選販売_08】インターナリーフローレスダイヤモンド(H&C) 4.0mm/0.245ctルース(D, IF, 3Excellent H&C)
coming soon 【9/3 22時販売】スリランカ産パープルサファイア 0.556ctルース 鑑別書
coming soon 【9/3 22時販売】トルコ産ダイアスポア 0.410ctルース
coming soon 【12564233掲載】アングレサイト 4.400ctルース
Sold out タンザニア産ヴァイオレットサファイア 0.523ctルース
Sold out タンザニア産サファイア 0.622ctルース
Sold out 【12564183掲載】マダガスカル産サファイア 1.480ctルース
Sold out 【12564164掲載】ミャンマー産マスグラバイト 0.546ctルース
Sold out マダガスカル産オレンジサファイア 0.671ctルース
Sold out ミャンマー産ピンクグロッシュラーガーネット 0.558ctルース
Sold out マダガスカル産パパラチアサファイア 0.690ctルース 中宝鑑
Sold out ブラジル産サンタマリアアクアマリン 0.339ctルース
coming soon 【Lottery Sale 0829】Internally Flawless Diamond (H&C) 0.413ct Loose Stone (D, IF, 3Excellent H&C)
Sold out ジンバブエ産スフェーン 0.669ctルース
Sold out ブラジル産スフェーン 0.476ctルース
coming soon 【12564058掲載】ブラジル産スフェーン 0.956ctルース
Sold out ダイヤモンド(H&C) 0.257ctルース(D, SI1, Excellent H&C)

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.