Vertical: 5.1 - 6.0mm

Spanish Andalusite 5.7mm/0.706ct loose stone Sale price¥9,800

【KEN氏】ブラジル産アメジスト 5mm/0.390ctルース（セミオーダーメイドセット）

[Staff Selection] [Mr. KEN] Brazilian Amethyst 5mm/0.390ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

Tanzanian Lavender Tanzanite 0.382ct Loose Stone Sale price¥12,800

【KEN氏】ブラジル産グリーントルマリン 5.2mm/0.584ctルース（セミオーダーメイドセット）

[Staff Selection] [Mr. KEN] Brazilian Green Tourmaline 5.2mm/0.584ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

【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

[Staff Selection] [Mr. KEN] Tanzanian Iolite 5.5mm/0.589ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

Mexican egg-in-opal 1.243ct loose stone Sale price¥14,800

Ethiopian Opal 0.294ct Loose (Heart Shape, Faceted Cut) Sale price¥6,980

[Koshu Precious Stones plusthree] Green Quartz 6mm/0.743ct Loose with Patch Sale price¥25,800

Pink spinel 5.2mm/0.573ct loose stone Sale price¥6,580

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[Dandelion Cut] Madagascar Sphene 6.0mm/0.935ct Loose Stone

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Dandelion Cut Andalusite from Spain, 6.0mm/0.835ct Loose Stone

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[Item 12564594] Sri Lankan Uva Moonstone 0.566ct Loose Stone

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[Item 12562618] Sri Lankan Bicolor Sapphire 0.405ct Loose Stone

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[12564127 listed] Apatite 0.764ct loose stone

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[Item 12564405] Axinite from Pakistan (Blue Tint) 0.347ct Loose Stone

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[Available 10/10 at 10 PM] Brazilian Dumortierite in Quartz 0.757ct Loose Gemstone

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[Available 10/11 at 10 PM] Indian Iolite Sunstone 1.461ct Loose Gemstone

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[Deadline: Wed, Oct 21, 10:00 AM: Lottery Sale] Sri Lankan Unheated Sapphire 0.820ct Loose Stone GIA

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[Available 10/9 at 10 PM] Russian non-oil emerald loose stone 0.096ct

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[Deadline: Wed, 10/21 at 10 AM: Lottery Sale] Graphite in Orthoclase 0.724ct Loose Stone, GGL Certified

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[Lottery Sale ②_202608_04] Unheated Kashmir Sapphire 0.710ct Loose Stone GIA

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[Mon, Sep 14, 10:00 AM Deadline: Lottery Sale_09] Unheated Pigeon Blood Ruby 0.620ct Loose Stone AIGS

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[Available 10/3, 10 PM] Colombian Non-Oiled Emerald Cat's Eye 0.170ct Loose Stone GIA

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エチオピア産パライバトルマリン 0.480ctルース（CuO：2.291％、MnO：0.627％） GIA&成分分析資料

[Lottery Sale ②_16][For Winners Only][Item 12564598] Ethiopian Paraiba Tourmaline 0.480ct Loose Stone (CuO: 2.291%, MnO: 0.627%) with GIA & Composition Analysis Report

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[Deadline: Sat, Sep 5, 10:00 AM: Lottery Sale_05] Colombian Non-Oiled Emerald 5.3mm/0.600ct Loose Stone GIA

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[Available 10/1 at 10 PM] Australian Teal Blue Sapphire 0.555ct Loose Stone

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Ethiopian Paraiba Tourmaline 0.430ct Loose Stone (CuO: 2.334%, MnO: 0.642%) with GIA & Chemical Analysis Reports

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[Available 9/23 at 10 PM] Australian Black Opal 0.175ct Loose Stone

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[Available 9/19 at 22:00] Brazilian Neon Blue Apatite 0.383ct Loose Stone (CGL Certified)

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[Available 9/18, 10:00 PM] Chrysoberyl rough from Ratnapura, Sri Lanka, 0.335ct

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[Deadline: Wed, Oct 21, 10:00 AM: Lottery Sale] Sri Lankan Unheated Purple Sapphire (Color-shift type) 0.620ct Loose Stone GIA

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[Available 9/26 at 10 PM] Sri Lankan Green Zircon 0.643ct Loose Gemstone

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Poudretteite from Myanmar, 0.296ct loose stone, with GJC appraisal report.

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[Available 9/30 at 10 PM] Tanzanian Almandine Garnet 1.210ct Loose Gemstone

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【Available 9/21, 10 PM】 Zambian Emerald 0.199ct Loose Gemstone

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[Available 9/21 at 10 PM] Sri Lankan Blue Sapphire 5.3mm/0.754ct Loose Stone

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[Available 9/27 at 10 PM] Cacholong Amethyst 0.531ct Loose Stone

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Russian Demantoid Garnet (Horsetail) 5.8mm/0.851ct Loose Stone

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[Available 9/12, 10 PM] Sri Lankan Blue Sapphire 0.680ct Loose Gemstone with Identification Report

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[9/24 10 PM Sale] Hunan, China Cinnabar 1.654ct Loose Stone with Identification Report

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[On sale 9/17 at 22:00] Kenya Unheated Gold Sheen Sapphire 0.531ct Loose Gemstone with Identification Report

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[Available 9/13, 10:00 PM] Pink Cobalt Calcite from Spain, 0.520ct Loose Stone with Certificate of Authenticity

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Sri Lankan Green Zircon 0.670ct Loose Gemstone with Identification Report (Quiz Introduction)

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Green tourmaline 0.512ct loose stone

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[Available 9/6 at 10 PM] Indian Iolite Sunstone 0.509ct Loose Stone

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[Lottery Sale 0818_06] Madagascar Royal Blue Sapphire 0.623ct Loose Stone with Certificate

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Synthetic Alexandrite 0.841ct 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.