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Sold out Limited Edition of 10 Blue Gemstones! 💎 0.142ct Brazilian Paraiba Tourmaline, Euclase from Zimbabwe, 1.17ct Cobalt Spinel (Certificate of Authenticity: Color Shift), Benitoite, and More! Discounts Available for Multiple Purchases!
Sold out Internally Flawless Diamond (H&C) 3.8mm/0.210ct Loose (F, IF, 3 Excellent H&C) GIA & Chuho
Sold out チタン酸ストロンチウム 0.410ctルース
Sold out モザンビーク産パライバトルマリン 0.229ctルース
Sold out クリソベリルキャッツアイ 2.283ctルース
Sold out ジルコン 0.416ctルース
Sold out メキシコ産ファイアオパール 4.5mm/0.244ctルース
Sold out 【サンジェ氏】パープルスピネル 0.995ctルース
Sold out 【12545837掲載】モザンビーク産パライバトルマリン 0.256ctルース
Sold out オーストラリア産ボルダーオパール 4.470ctルース
Sold out パキスタン産カラーチェンジスフェーン 7.137ctルース
Sold out Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases.
Sold out Beryl 6.5mm/1.032ct loose stone
Sold out ベリル 0.951ctルース
Sold out スリランカ産エンスタタイト 2.159ctルース
Sold out Limited to 9 stones: Australian black opal (including semi-black opal) loose stone (includes a bonus white opal) (Multiple purchase discounts available)
Sold out Brazilian Dumortierite in Quartz 1.924ct Loose Stone
Sold out Brazilian Dumortierite in Quartz 1.995ct Loose Stone
Sold out Brazilian Dumortierite in Quartz 2.012ct Loose Stone
Sold out Madagascar Bicolor Sapphire 3.6mm/0.232ct Loose
Sold out Madagascar Sapphire 4.6mm/0.472ct Loose
Sold out Madagascar Bicolor Sapphire 4.5mm/0.637ct Loose
Sold out Madagascar Bicolor Sapphire 5.8mm/1.006ct Loose
Sold out Brazilian bicolor tourmaline 7.017ct loose stone
Sold out Australian boulder opal 2.326ct loose
Sold out 1.837ct loose Australian black opal
Sold out Australian white opal 1.928ct loose
Sold out Rainbow Garnet (Andradite Garnet) 7.0mm/2.135ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out Australian Black Opal 0.825 ct Loose Stone
Sold out オーストラリア産ホワイトオパール 4.170ctルース
Sold out Colombian Trapiche Emerald 2.318ct Loose
Sold out メキシコ産ファイアオパール 1.283ctルース
Sold out ミャンマー産スピネルインマーブル 39.231ctルース
Sold out Australian black opal 0.623ct loose stone
Sold out Sri Lankan blue sapphire 0.645ct loose stone
Sold out Red Coral from Kochi Prefecture (6.833ct Loose Stone)
Sold out Red coral (coral) 1.467ct loose stone
Sold out Red coral (coral) 1.406ct loose stone
coming soon 【Lottery Sale_0612_04】【Dandelion Cut】Mali Garnet (Grossular/Andradite Garnet) from Mali 6.0mm/1.018ct Loose Stone with Certificate
Sold out [Sakura In-Cut] Mali Garnet (Grossular/Andradite Garnet) from the Republic of Mali, 6.0mm/0.920ct Loose Stone with Certificate of Authenticity
Sold out [Sakura Shape] Oregon Sunstone from the United States, 1.104ct Loose
Sold out Loose 1.206ct Oregon Sunstone from the USA
Sold out [Sakura Shape] Oregon Sunstone from the United States, 1.201ct Loose
Sold out [Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.685ct Loose
Sold out [Dandelion Cut] Madagascar Sphene 6.0mm/0.775ct Loose Stone
Sold out [Dandelion Cut] Madagascar Sphene 0.950ct Loose Stone
Sold out [Sakura In-Cut] Tibetan Andesine 6.0mm/0.631ct Loose Stone
Sold out [Sakura In-Cut] Tibetan Andesine 8.0mm/1.366ct Loose Stone

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.