Mexican Hyalite Opal 1.687ct Loose
Sale price¥9,800
Brazilian Rubellite 2.588ct Loose Stone
Sale price¥69,800
Brazilian Rubellite 2.439ct loose stone
Sale price¥69,800
Brazilian tourmaline cat's eye 0.810ct loose stone
Sale price¥2,980
Mozambique pink tourmaline 1.006ct loose stone
Sale price¥8,800
Mexican Fire Opal 3.160ct Loose
Sale price¥29,800
Mexican Fire Opal (Faceted Cut) 0.934ct Loose
Sale price¥25,800
Brazilian Green Tourmaline 0.840ct Loose (Pixel Cut)
Sale price¥8,800
Australian black opal 0.544ct loose stone
Sale price¥18,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.794ct Loose Stone
Sale price¥15,800
Amazon Green Opal 7mm/0.88ct Loose
Sale price¥7,980
Paraiba tourmaline from Brazil 0.217ct loose (CuO:1.5%, MnO:0.5%)
Sale price¥39,800
Ethiopian Opal 1.521ct Loose
Sale price¥3,980
Ethiopian Opal 1.382ct Loose
Sale price¥3,980
Ethiopian Opal 1.014ct Loose
Sale price¥3,980
Brazilian Paraiba tourmaline 0.215ct loose (CuO:1.1%, MnO:3.3%)
Sale price¥55,800
Australian Iron Opal 17.450ct Loose
Sale price¥12,800
Australian Boulder Opal 41.770ct Loose
Sale price¥29,800
Australian Boulder Opal 15.020ct Loose
Sale price¥18,800
Australian Boulder Opal 12.220ct Loose
Sale price¥12,800
Mexican Fire Opal 1.330ct Loose (Contralus Opal)
Sale price¥19,800
Mexican Fire Opal 1.610ct Loose (Contralus Opal)
Sale price¥19,800
Brazilian Green Tourmaline Cat's Eye 5.210ct Loose Stone
Sale price¥25,800
Brazilian Bicolor Tourmaline 4.554ct Ruth Japanese-German Edition
Sale price¥298,000
Mexican Cantera Opal 6.112ct Loose
Sale price¥59,800
Mexican Opal (Faceted Cut) 0.496ct Loose
Sale price¥9,800
Mexican Fire Opal (Faceted Cut) 0.608ct Loose
Sale price¥12,800
Mexican Cantera Opal 14.458ct loose stone (faceted cut)
Sale price¥14,800
Synthetic Opal 2.026ct Loose
Sale price¥19,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.531ct Loose Stone
Sale price¥29,800
Brazilian Paraiba Tourmaline in Quartz 1.054ct Loose Stone
Sale price¥18,800
Brazilian Paraiba Tourmaline in Quartz 7.9mm/1.133ct Loose Stone
Sale price¥22,800
Brazilian Paraiba Tourmaline in Quartz 1.530ct Loose Stone
Sale price¥29,800
Brazilian Paraiba Tourmaline in Quartz 3.046ct loose stone
Sale price¥45,800
Brazilian Paraiba Tourmaline in Quartz 4.5mm/0.309ct Loose Stone
Sale price¥12,800
Brazilian Paraiba Tourmaline in Quartz 4.3mm/0.292ct Loose Stone
Sale price¥12,800
Brazilian Paraiba Tourmaline in Quartz 4.5mm/0.328ct Loose Stone
Sale price¥12,800
Afghanistan Bicolor Tourmaline 1.653ct Loose Stone
Sale price¥49,800
Australian white opal 2.318ct loose
Sale price¥12,800
Brazilian bicolor tourmaline 7.445ct loose stone
Sale price¥69,800
Brazilian Bicolor Tourmaline Cat's Eye 9.5mm/4.730ct Loose Stone
Sale price¥18,800
Synthetic Black Opal 5.013ct Loose
Sale price¥59,800
Brazilian bicolor tourmaline cat's eye 2.640ct loose stone
Sale price¥12,800
Brazilian Paraiba tourmaline 0.225ct raw stone (CuO:2.1%, MnO:0.9%)
Sale price¥8,800
Australian Boulder Opal 6.160ct Loose
Sale price¥18,800

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.
Written by KARATZ, book “Jewelry Illustrated Book”
The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.