[Takeshi Yamamoto] Bicolor Smoky Quartz 10.674ct Loose Stone
Sale price¥39,800
Nigerian Cobalt Garnite 0.216ct Loose Stone, Japan-Germany Exchange
Sale price¥45,800
Paraiba tourmaline from Brazil 0.217ct loose (CuO:1.5%, MnO:0.5%)
Sale price¥39,800
Zimbabwe bicolor euclase rough stone 0.960ct
Sale price¥39,800
Congo hemimorphite 9.849ct loose stone
Sale price¥49,800
Colombian mica in emerald 1.940ct loose
Sale price¥49,800
![[Koshu Precious Stone Cutting] Brazilian Sky Blue Topaz 10.60ct Loose Stone [Collaboration] Patch](http://store.karatz.jp/cdn/shop/files/P5120836.jpg?v=1747480996&width=4000)
Round Diamond 0.389ct Loose (Cabochon Cut)
Sale price¥39,800
Brazilian Paraiba Tourmaline in Quartz 3.046ct loose stone
Sale price¥45,800
Afghanistan Bicolor Tourmaline 1.653ct Loose Stone
Sale price¥49,800
Tanzania UV type bicolor tsavorite 0.947ct loose stone
Sale price¥39,800
Tanzanian Kornerupine 0.616ct loose stone
Sale price¥49,800
Tanzanian Kornerupine 0.500ct Loose Stone
Sale price¥39,800
American Red Beryl 0.200ct Loose (Heart Shape) Nikkeikan
Sale price¥35,800
American Red Beryl 0.252ct Loose
Sale price¥39,800
Madagascar Bicolor Sapphire 0.298ct Loose (Padparadscha Color)
Sale price¥35,800
Afghanistan Bicolor Beryl 9.100ct Loose Stone
Sale price¥34,800
Cassiterite 1.676ct loose stone with certificate
Sale price¥45,800
Cassiterite 1.477ct loose stone (bicolor) with certificate
Sale price¥39,800
Tanzania Bicolor Zoisite 2.110ct Loose Stone
Sale price¥45,800
Indian Bloodshot Iolite Sunstone 7.630ct Loose
Sale price¥39,800
South African Diamond Rough (Sawable) 0.107ct Rough Trigon
Sale price¥42,800
Pakistani Veirinite 0.173ct loose stone with certificate
Sale price¥45,800
Pakistani Veirinite 0.157ct loose stone with certificate
Sale price¥39,800
![[Koshu Precious Stone Cutting] Fluorite in Quartz 6.420ct Loose Stone [Collaboration] Patch](http://store.karatz.jp/cdn/shop/files/collage_3269a09e-f7e8-4625-a34c-9b27a3584d4b.png?v=1746103198&width=2000)
Colombian emerald 8.90ct rough stone
Sale price¥45,800
![[Koshu Precious Stone Cut] Bicolor Fluorite 20.850ct Loose Stone [Collaboration] Patch](http://store.karatz.jp/cdn/shop/files/collage_cc003cbe-63f3-4a0a-9253-31012fc79497.png?v=1745533157&width=2000)
Zimbabwe bicolor euclase 0.110ct loose stone
Sale price¥49,800
Brazilian Pink Imperial Topaz 0.909ct Loose Japanese-German Edition
Sale price¥39,800
Afghanite from Afghanistan 0.193ct loose stone
Sale price¥39,800
![[Koshu Precious Stone Cut] Scololite 5.350ct Loose Stone Patch](http://store.karatz.jp/cdn/shop/products/5350ct-167321_92a3d322-8cea-4718-867a-da0305e9cb8e.jpg?v=1745070984&width=1032)
[Koshu Precious Stone Cut] Scololite 5.350ct Loose Stone Patch
Sale price¥39,800
[Sakura Shape] Brazilian Green Tourmaline 6.7mm/1.057ct Loose Patch
Sale price¥39,800
Mexican Cantera Opal 3.176ct Loose
Sale price¥39,800
Russian alexandrite 0.093ct loose
Sale price¥39,800
Brazilian unheated pink imperial topaz (sherry pink) 0.476ct loose stone
Sale price¥39,800
Pt950 Sri Lankan purple sapphire 0.318ct and blue sapphire earrings
Sale price¥39,800
Myanmar color change zircon 0.596ct loose stone
Sale price¥39,800
0.095ct Brazilian Alexandrite Loose Stone (Emerald Cut)
Sale price¥35,800
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.
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.