Ethiopian Sunstone 0.590ct Loose
Sale price¥9,800
Oregon Sunstone from the United States 0.276ct loose stone
Sale price¥7,980
![[On sale from 22:00 on 5/1] Mali Garnet (Grossular/Andradite Garnet) 4.2mm/0.398ct Loose Stone with Certificate of Authenticity from the Republic of Mali](http://store.karatz.jp/cdn/shop/files/P3137639_0e3bd582-8297-4c0c-9bf5-09a61c159ace.jpg?v=1749163154&width=2881)
Brazilian Paraiba tourmaline 0.184ct raw stone (CuO:1.5%, MnO:0.6%)
Sale price¥12,800
Brazilian Paraiba tourmaline 0.180ct raw stone (CuO:1.8%, MnO:0.1%)
Sale price¥12,800
Colombian Trapiche Emerald 2.730ct Loose
Sale price¥98,000
Tanzanian bicolor sapphire 0.279ct loose stone
Sale price¥18,800
Euclase from Brazil 0.210ct Ruth Japanese German edition
Sale price¥29,800
![[Koshu Precious Stones Plusthree] Sri Lankan Hessonite Garnet 0.99ct Loose Color "Collaboration" Patch](http://store.karatz.jp/cdn/shop/files/099ct-663728.jpg?v=1745883466&width=1038)
Colombian emerald 8.90ct rough stone
Sale price¥45,800
Brazilian Euclase 5.0mm/0.492ct Loose Stone
Sale price¥9,800
Brazilian Dumortierite in Quartz 55.207ct Rough Stone
Sale price¥8,800
Dominican Republic Conch Pearl 0.775ct Loose (with flame pattern)
Sale price¥39,800
Myanmar pink spinel 0.142ct loose stone
Sale price¥8,800
[Koshu Precious Stones plusthree] Bicolor Fluorite 5.030ct Loose Patch
Sale price¥29,800
Brazilian Dendritic Agate 68.090ct Loose
Sale price¥1,980
Brazilian Paraiba tourmaline in quartz 3.678ct loose
Sale price¥9,800
Colombian Euclase 2.360ct loose
Sale price¥79,800
Book "Gemstone Encyclopedia" (KARATZ, editor: Keiichiro Koyama)
Sale price¥2,640
Brazilian bicolor tourmaline 12.842ct loose
Sale price¥298,000
Russian demantoid garnet (horsetail recognized) 5.5mm/0.710ct loose
Sale price¥148,000
Russian demantoid garnet (horsetail recognized) 5.3mm/0.692ct loose
Sale price¥128,000
Brazilian Garden Quartz 15.7mm/12.860ct Loose Stone
Sale price¥4,980
Colombian emerald cat's eye 0.083ct loose
Sale price¥6,980
Colombian emerald cat's eye 0.078ct loose
Sale price¥6,980
![[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 1.511ct Loose Japanese-German Edition
Sale price¥69,800
Namibian Jeremejevite 0.153ct loose stone by Nikkei
Sale price¥15,800
Namibian Jeremejevite 0.118ct loose stone by Nikkei
Sale price¥12,800
Brazilian Pink Imperial Topaz 0.909ct Loose Japanese-German Edition
Sale price¥39,800
Nigerian pink tourmaline 1.527ct loose stone
Sale price¥18,800
Mexican Hyalite Opal 4.9mm/0.348ct Loose
Sale price¥12,800
Mexican Hyalite Opal 6.9mm/1.134ct Loose
Sale price¥25,800
Mexican Hyalite Opal 5.2mm/0.439ct Loose Stone
Sale price¥12,800
Mexican Hyalite Opal 4.8mm/0.304ct Loose Stone
Sale price¥9,800
Mexican Hyalite Opal 5.0mm/0.378ct Loose Stone
Sale price¥11,000
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.
業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。
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.