Round Cut

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【32501889掲載】ダイヤモンド（H&C） 0.194ctルース(G, VVS-1, 3Excellent H&C)

Diamond (H&C) 3.7mm/0.194ct Loose (G, VVS-1, 3Excellent H&C)

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フローレスダイヤモンド（H&C） 0.230ctルース(D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 4.0mm/0.230ct Loose (D, FL, 3Excellent H&C) GIA & Central Gem Laboratory

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【32501881掲載】インターナリーフローレスダイヤモンド（H&C） 0.340ctルース(F, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 4.5mm/0.340ct Loose (F, IF, 3Excellent H&C) GIA & CBT

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Lazulite from Pakistan 2.5mm/0.063ct Loose Gemstone with Certificate

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【32501878掲載】グレーダイヤモンド 0.109ctルース(VERY LIGHT GRAY, SI-1)

Gray Diamond 3.0mm/0.109ct Loose (VERY LIGHT GRAY, SI-1)

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カメレオンダイヤモンド 0.118ctルース(LIGHT GRAYISH GREENISH YELLOW, VS-2)

Chameleon Diamond 3.1mm/0.118ct Loose Stone (LIGHT GRAYISH GREENISH YELLOW, VS-2)

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Pink Diamond 2.3mm/0.049ct Loose Stone (FANCY PINK, VS-1) Central Gem Lab

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Myanmar Red Spinel 3.7mm/0.257ct Loose Gemstone with Certificate

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Tanzanian Orange Spinel 3.9mm/0.273ct Loose Stone with Gemstone Report

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Oregon Sunstone from the USA, 8.1mm/1.893ct, loose

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Taaffeite from Myanmar 2.8mm/0.114ct Loose Gemstone with Certificate

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Brazilian Alexandrite 2.7mm/0.105ct Loose Stone

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

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[On sale May 5th at 10 PM] Zimbabwean Bicolor Euclase 2.9mm/0.102ct Loose Stone

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

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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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1.362ct loose Oregon sunstone from the United States

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2.418ct loose Oregon sunstone from the United States

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U.S. Anthill Garnet 4.0mm/0.370ct Loose

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Synthetic rutile 5.1mm/0.877ct loose stone

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Synthetic Rutile 1.982ct Loose Stone

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Synthetic rutile 0.505ct loose

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Diamond 2.9mm/0.094ct Loose (E, VVS2, VeryGood)

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Madagascar Grandidierite 0.109ct loose stone

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Grandidierite from Madagascar 0.108ct loose stone

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Synthetic rutile 3.9mm/0.329ct 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.