Tanzanite from Tanzania 5.8mm/0.803ct loose stone
Sale price¥35,800
Russian Demantoid Garnet (Horsetail certified) 2.4mm/0.063ct loose stone
Sale price¥39,800
Russian Demantoid Garnet (Horsetail certified) 4.6mm/0.464ct loose stone
Sale price¥128,000
Russian demantoid garnet (horsetail recognized) 2mm/0.055ct loose
Sale price¥6,980
Brazilian Dumortierite in Quartz 3.188ct loose stone (faceted cut)
Sale price¥12,800
Brazilian Dumortierite in Quartz 1.279ct loose stone (faceted cut)
Sale price¥9,800
Brazilian Dumortierite in Quartz 1.447ct loose stone (faceted cut)
Sale price¥18,800
Brazilian Dumortierite in Quartz 1.284ct loose stone (faceted cut)
Sale price¥9,800
Brazilian Dumortierite in Quartz 1.276ct loose stone
Sale price¥6,980
Tanzanite 1.540ct loose stone
Sale price¥49,800
Tanzanite 1.055ct loose stone
Sale price¥29,800
Tanzanite 1.458ct loose stone
Sale price¥39,800
Mozambique pink tourmaline 1.006ct loose stone
Sale price¥8,800
Russian Diopside 1.506ct Loose Stone
Sale price¥29,800
Brazilian Sky Blue Topaz (untreated) 2.560ct loose stone
Sale price¥12,800
Brazilian unheated pink imperial topaz (sherry pink) 0.931ct loose stone
Sale price¥98,000
Brazilian unheated pink imperial topaz (sherry pink) 0.254ct loose stone
Sale price¥14,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.794ct Loose Stone
Sale price¥15,800
Paraiba tourmaline from Brazil 0.217ct loose (CuO:1.5%, MnO:0.5%)
Sale price¥39,800
Brazilian Tinkerbell Quartz (Pink Fire Quartz) 6.020ct Loose Stone
Sale price¥9,800
Brazilian Bicolor Tourmaline 4.554ct Ruth Japanese-German Edition
Sale price¥298,000
South African diamond rough stone 0.330ct
Sale price¥5,980
Round Diamond 0.389ct Loose (Cabochon Cut)
Sale price¥39,800
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
Tanzanite from Tanzania 1.045ct loose stone
Sale price¥29,800
Afghanistan Bicolor Tourmaline 1.653ct Loose Stone
Sale price¥49,800
Tanzania UV type bicolor tsavorite 0.947ct loose stone
Sale price¥39,800
South African diamond rough (sawable) 0.103ct rough (with trigon)
Sale price¥24,800
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
Russian Demantoid Garnet (Horsetail Recognized) 5.1mm/0.664ct Loose Stone
Sale price¥188,000
Russian Demantoid Garnet 3.0mm/0.194ct Loose Stone
Sale price¥18,800
Brazilian bicolor tourmaline cat's eye 2.640ct loose stone
Sale price¥12,800
South African diamond rough stone 0.210ct
Sale price¥8,800
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.