Vertical: 5.1 - 6.0mm

Brazilian Paraiba Tourmaline 0.341ct loose stone (CuO:1.81%, MnO:1.96%) Nakahokan analysis report Sale price¥598,000

Mica in Quartz 0.544ct Loose Stone Sale price¥6,980

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

【甲州貴石切子plusthree】スカイブルートパーズ 6mm/0.988ctルースワッペン付

[Koshu Precious Stones Plusthree] Sky Blue Topaz 6mm/0.988ct Loose Stone with Patch Sale price¥25,800

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

American Herkimer Diamond (Rock Crystal) 5.5mm/0.534ct Loose Sale price¥8,800

American Herkimer Diamond (Rock Crystal) 5.3mm/0.594ct Loose Sale price¥8,800

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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[Listed as 12563228] Ruby 0.496ct Loose Stone

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Spanish Andalusite 0.535ct loose stone

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ブラウンダイヤモンド 0.600ctルース(FANCY LIGHT BROWN, SI-2)

Brown Diamond 5.3mm/0.600ct Loose Stone (FANCY LIGHT BROWN, SI-2)

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Madagascar Padparadscha Sapphire 0.517ct Loose DGL Certified

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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） 0.404ctルース

Andesine Labradorite (also known as Rainbow Moonstone) 0.404ct loose stone

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[On sale May 24, 10 PM JST] Spanish Andalusite 5.0mm/0.469ct Loose Stone

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【Sales from 10 PM on May 17th】Synthetic Alexandrite 0.557ct Loose Stone

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[On sale May 15th at 10 PM] Tanzanian purple sapphire 0.677ct loose stone (color-shift type)

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[On Sale May 10th, 10 PM] Madagascar Iolite Sunstone 0.388ct Loose Gemstone

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Tanzanian Kornerupine 0.700ct Loose Stone

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【12562785掲載】コロンビア産エメラルドキャッツアイ 0.574ctルース

【On sale May 2nd, 10 PM JST】Colombian Emerald Cat's Eye 0.574ct Loose Stone

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Tanzanian Bicolor Tanzanite 0.419 ct Loose Stone

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Synthetic Cobalt Spinel 0.466ct Loose

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カメレオンダイヤモンド 0.153ctルース(LIGHT GRAY GREEN, SI-1)

Chameleon Diamond 0.153ct Loose (LIGHT GRAY GREEN, SI-1)

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[On sale May 1st at 10 PM] China Hunan Province Cinnabar Loose Stone 0.982ct with Certification

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Indian Alexandrite Cat's Eye 1.03ct Loose GIA

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0.260ct Loose Parti-Color Paraiba Tourmaline from Brazil

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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） 0.463ctルース

0.463 ct Loose Madagascar Andesine-Labradorite (Common Name: Rainbow Moonstone)

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Kenya Bi-color Grossular Garnet (Bi-color Tsavorite) 0.479ct Loose Stone

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Madagascar Iolite Sunstone 0.311ct Loose

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Myanmar Leuco Garnet 0.324ct loose stone

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Australian Rainbow Lattice Sunstone 0.865ct Loose

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Tanzanite 5mm/0.580ct loose stone (sugarloaf cut)

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Bolivian phosphophyllite, 0.300ct loose stone, with鑑別書

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Australian black opal 0.232ct loose stone

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Tanzanian UV Type Mint Garnet 0.440ct Loose Stone

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0.628ct Mozambican Rhodolite Garnet Loose Stone

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0.522 ct Dumortierite in Quartz from Brazil, Loose

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Montana Sapphire 0.458ct Loose (Bi-Color Sapphire)

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Montana Sapphire 0.416ct Loose (Bi-Color Sapphire)

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American Neptunite 0.290ct Loose Stone with Certificate of Authenticity

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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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【12562003掲載】奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 1.207ctルース

Rainbow Garnet (Andradite Garnet) 1.207ct Loose Stone from Tenkawa Village, Nara Prefecture

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