Oval Cut

Brazilian copper rutilated quartz 1.937ct loose stone Sale price¥8,800

Brazilian copper rutilated quartz 1.991ct loose stone Sale price¥6,980

【スタッフセレクション】マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.450ctルース（セミオーダーメイドセッ

[Staff Selection] Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.450ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

Tanzanian Kornerupine Cat's Eye 1.539ct Loose Stone Sale price¥9,800

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【12563376 listed】Euclase from Zimbabwe 0.101ct Loose Sale price¥27,800

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[Listed as 12563489] Sri Lankan Blue Sapphire 0.636 ct Loose Stone Sale price¥39,800

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[Listed as 12563731] Brazilian Indicolite Tourmaline 0.404 ct Loose Stone Sale price¥39,800

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[Listed as 12563398] Brazilian Alexandrite 0.220ct Loose Stone

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[12563504 Listed] Unheated Pigeon Blood Ruby from Burma 0.300ct Loose

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[On sale July 22nd at 10 PM] Jeremejevite from Namibia 0.094ct Loose Stone with Certification

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【12563890掲載】オーストラリア産非加熱ティールブルーサファイア 1.010ctルース

[Lottery Sale 0718_05] Unheated Australian Teal Blue Sapphire 1.010 ct Loose GIA Sale price¥158,000

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Brazilian Alexandrite 0.290ct Loose Stone GIA

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[On sale July 12th at 10 PM] Madagascar Grandidierite 0.179ct Loose Gemstone with Certificate

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[On sale July 12th at 10 PM] Madagascar Neon Blue Apatite 0.364ct Loose Stone

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[Listed as 12563375] Zimbabwean Euclase 0.065ct Loose Gemstone

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[Lottery Sale_0612_08] Unheated Purple Sapphire 0.775ct Loose Gemstone - Houseki Kyo

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[Lottery Sale 0531_09] Nigerian Mint Green Tourmaline 1.319ct Loose Stone with Certificate Sale price¥55,800

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[For sale on July 4th at 10 PM] Mozambique Ruby 0.300ct Loose Stone with Gemstone Report

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[On sale July 4th at 10 PM] Brazilian Dumortierite in Quartz 1.082ct Loose Stone

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[On sale July 5th at 10 PM] Brazilian Black Garden Quartz 3.621ct Loose Stone

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[On sale July 5th, 10 PM JST] Eudialyte from Zimbabwe, 0.053ct Loose Gemstone with Certificate

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[For Sale on July 5 at 10 PM] Sri Lankan Blue Sapphire 0.557ct Loose Stone with Appraisal

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[On sale July 5th at 10 PM] Mozambique Ruby 0.415ct Loose Stone with Appraisal

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U.S. Benitoite 0.262ct Loose Gemstone with Certificate

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Brazilian copper rutilated quartz 2.101ct loose stone

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[Sales begin June 27th, 10 PM] Chinese Hunan Cinnabar 1.508ct Loose Stone with Certification

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[On sale June 30th, 10 PM JST] Petzottaite from Madagascar, 0.202ct Loose Gemstone with Certificate

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[On sale June 30th at 10 PM] Brazilian Silky Alexandrite 0.286ct Loose Stone with Certificate

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0.320 ct Sri Lankan Alexandrite Loose Stone, GIA

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[On Sale June 28th, 10 PM JST] Zimbabwe Euclase 0.054ct Loose Gemstone with Certificate

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【On Sale 6/25 10 PM JST】Euclase from Zimbabwe 0.070 ct Loose Stone with Certificate

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[Sales on 6/16 at 10 PM] Myanmar Red Spinel 0.578ct Loose Gemstone

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[On sale June 20 at 10 PM] Cambodian orange zircon 3.800ct loose stone

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[On sale June 7th at 10 PM] Nigerian Cobalt Garnet 0.123ct Loose Stone with Gemstone Identification Report

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[On sale June 8th, 10 PM] Bi-Color Sapphire 1.040 ct Loose Gemstone GIT

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[Sales start on 6/6 at 10 PM JST] Kochi Prefecture Harvested Red Coral 6.224ct Loose Gemstone

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[On sale June 6th, 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 1.455ct Loose Stone with Gemological Report

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[On Sale June 6, 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 1.782ct Loose Stone with Appraisal Report

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Brazilian Imperial Topaz 1.237 ct Loose Stone with Certificate of Authenticity [On Sale June 5th at 10 PM]

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[Sale on June 12 at 10 PM] Ruby 0.496 ct Loose Stone (Hokikyō)

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[On sale June 4th at 10 PM] Kenyan Tsavorite 0.505ct Loose Stone

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【On sale May 30th at 10 PM JST】Tanzanian Tanzanite 0.328ct Loose Stone

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[Sale on 6/6 at 10 PM JST] Brazilian Seafoam Tourmaline 0.347 ct Loose Gemstone

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[Sale on 5/27 at 10 PM] Mozambique Ruby 0.187 ct Loose Stone with Gemstone Report

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[Sales start 10:00 PM on June 8th] Kochi Prefecture Production Blood Red Coral Loose Stone 2.423ct

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[On sale June 8th at 10 PM JST] Kochi Prefecture-produced oxblood coral, 1.879 ct 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.