Round Cut

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Benitoite from the USA, 3.4mm/0.175ct loose

coming soon

【12555695掲載】ブラジル産パライバトルマリンインクォーツ 0.313ctルース

Brazilian Paraiba Tourmaline In Quartz 0.50mm/.313ct Loose Sale price¥15,800

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[Sakura Cut] Mongolian Andesine 8.0mm/1.652ct Necklace

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Bicolored Euclase from Zimbabwe 2.9mm/0.102ct Loose

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[Sakura Cut] Mongolian Andesine 8.0mm/1.652ct Loose Stone

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【ダンデライオンカット】モンゴル産カラーチェンジアンデシン 6.0mm/0.774ctルース

[Dandelion Cut] Mongolian Color-Change Andesine 6.0mm/0.774ct Loose Gemstone

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[Dandelion Cut] 7mm/1.412ct Sphene Loose Stone from Madagascar

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Russian Demantoid Garnet (Horsetail) 3.8mm/0.265ct Loose Stone

coming soon

Bulgarian Sphalerite 5.8mm/1.058ct Loose Stone Sale price¥39,800

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YAG (Yttrium Aluminum Garnet) 7.1mm/1.927ct Loose Stone by Nikkei Kan

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[Clover in cut] Emerald 9mm/2.498ct {Collaboration} Loose with patch

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Canadian Natrolite 5.0mm/0.355ct Loose Stone with Japan-Germany Gemological Report

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Oregon Sunstone from the United States, 7.2mm/1.334ct loose stone

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Oregon Sunstone from USA 7.1mm/1.366ct Loose

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Bicolor Sphalerite 9.8mm/4.517ct loose

coming soon

Canadian Eudialite 2.5mm/0.051ct Loose Stone with Certificate of Authenticity Sale price¥18,800

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Canadian Eudialyte 2.5mm/0.047ct Loose Stone with Certification

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Canada Eudialyte 2.5mm/0.059ct Loose Stone with Certificate of Authenticity

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Spanish Sphalerite 6.5mm/1.475ct Loose Stone

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Spanish Sphalerite 5.6mm/0.920ct Loose Stone

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Spanish Sphalerite 5.5mm/0.878ct Loose

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Spanish Sphalerite 5.7mm/0.903ct Loose

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Indian alexandrite cat's eye 0.679ct loose

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Oregon Sunstone from the United States, 6.0mm/0.793ct loose stone

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Oregon Sunstone from the United States, 7.0mm/1.169ct loose stone

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1.273ct loose Oregon sunstone from the United States

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Oregon Sunstone from USA 7.1mm / 1.290ct Loose

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Oregon Sunstone from the USA, 1.325ct loose

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Parasitic Peridot 2.0mm/0.037 Loose

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Afghanistan Seafoam Tourmaline 4.0mm/0.264ct Loose Stone

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Violet sapphire from Madagascar 4.6mm/0.462ct loose stone

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Violet Sapphire 3.9mm/0.265ct Loose

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Madagascar Violet Sapphire 4.0mm/0.300ct Loose

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Purple Apatite 5.3mm/0.822ct Loose Stone with Certificate of Authenticity

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Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.676ct Loose Stone

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Colombian Oil-Free Emerald 3.5mm/0.170ct Loose GIA

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Brazilian Golden Beryl 8.9mm/2.414ct Loose Stone

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Synthetic Black Opal 7.5mm/1.348ct Loose

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イエローダイヤモンド（H&C） 0.313ctルース(UNDER N(VERY LIGHT YELLOW), VVS-2, Excellent H&C)

Yellow Diamond (H&C) 4.3mm/0.313ct Loose (VERY LIGHT YELLOW), VVS-2, Excellent H&C)

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非加熱ヴァイオレットサファイア 5.1mm/0.760ctルース（シルクインクージョン）

Unheated Violet Sapphire 5.1mm/0.760ct Loose (Silk Inclusion)

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Tanzanite from Tanzania 6.5mm/1.026ct loose stone

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Russian Demantoid Garnet (Horsetail certified) 3.6mm/0.293ct loose stone

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Sunstone (Illusion Sunstone) 8.2mm/2.339ct Loose Stone

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Tanzania Bicolor Zoisite 7.0mm/1.538ct Loose Stone

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[Sale on hold due to E28 event announcement] [On sale at 22:00 on 4/6] Tanzanian bicolor zoisite 6.7mm/1.489ct loose stone

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アイスブルーダイヤモンド 3.0mm/0.090ctルース（Undetermined） GIA

Ice Blue Diamond 3.0mm/0.090ct Loose (Undetermined) GIA

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.