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Sold out Myanmar Red Spinel 0.196ct Loose Stone

Myanmar Red Spinel 0.196ct Loose Stone
Sold out 《Limited to 5 stones》Carving Gacha 💎 Green Quartz, Lemon Quartz, Blue Topaz 《Multiple Purchase Discount Available》

《Limited to 5 stones》Carving Gacha 💎 Green Quartz, Lemon Quartz, Blue Topaz 《Multiple Purchase Discount Available》
Sold out Limited to 14 stones: Rainbow Garnet from Tenkawa Village, Nara Prefecture (faceted by Saint-Jay) [Multiple purchase discounts available]

Limited to 14 stones: Rainbow Garnet from Tenkawa Village, Nara Prefecture (faceted by Saint-Jay) [Multiple purchase discounts available]
Sold out [#May2026Campaign, #May2026Gacha][On sale February 13, 10 PM] Limited 6 sets: Colombian Reverse Trapiche Emerald & Brazilian Emerald (Sugarloaf Cut) 2-stone set [Multi-buy discount available]

[#May2026Campaign, #May2026Gacha][On sale February 13, 10 PM] Limited 6 sets: Colombian Reverse Trapiche Emerald & Brazilian Emerald (Sugarloaf Cut) 2-stone set [Multi-buy discount available]
Sold out Madagascar Pezzottaite Gacha (2.2-2.5mm, Round Cut) - Limited to 6 Stones (Multiple Purchase Discount Available)

Madagascar Pezzottaite Gacha (2.2-2.5mm, Round Cut) - Limited to 6 Stones (Multiple Purchase Discount Available)
Sold out Limited to 13 stones! Bicolor Gacha 💎 Bicolor Sphene, usually priced at ¥79,800, Party-color Paraiba Tourmaline, usually priced at ¥39,800, and more. (Multiple Purchase Discount Available)

Limited to 13 stones! Bicolor Gacha 💎 Bicolor Sphene, usually priced at ¥79,800, Party-color Paraiba Tourmaline, usually priced at ¥39,800, and more. (Multiple Purchase Discount Available)
Sold out Color Change Gacha💎 Russian alexandrite, Brazilian alexandrite, and Tanzanian color-change garnets, usually priced at ¥39,800. 《Discounts for multiple purchases available》

Color Change Gacha💎 Russian alexandrite, Brazilian alexandrite, and Tanzanian color-change garnets, usually priced at ¥39,800. 《Discounts for multiple purchases available》
Sold out 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） 1.458ctルース

Rainbow Garnet (Andradite Garnet) 1.458ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out 【12561507掲載】ブラジル産ラベンダークォーツ（スコロライト） 0.716ctルース

Brazilian Lavender Quartz (Scolite) 0.716ct Loose Gemstone
Sold out 0.092ct loose stone with iolite and phlogopite (phlogopite)

0.092ct loose stone with iolite and phlogopite (phlogopite)

Sold out Tanzanian Kornerupine (with Goethite) 2.6mm/0.068ct Loose

Tanzanian Kornerupine (with Goethite) 2.6mm/0.068ct Loose

Sold out Diamond rough (makeable) 0.279ct rough

Diamond rough (makeable) 0.279ct rough
Sold out Shimizu Precious Stones: Includes 7mm Dandelion Cut Morganite 💎 Morganite Gacha (Multiple Purchase Discounts Available)

Shimizu Precious Stones: Includes 7mm Dandelion Cut Morganite 💎 Morganite Gacha (Multiple Purchase Discounts Available)

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.