Birthstone list
Colombian Trapiche Emerald 0.372ct Loose
Sale price¥19,800
Tanzanian bicolor tanzanite rough stone 2.750ct
Sale price¥9,800
Brazilian Paraiba Tourmaline 0.821ct rough stone
Sale price¥39,800
Brazilian Paraiba Tourmaline 0.200ct loose stone (CuO: 1.7%, MnO: 2.8%)
Sale price¥98,000
American Herkimer Diamond 5.6mm/0.516ct Loose
Sale price¥9,800
Mexican Cantera Opal 4.835ct Loose
Sale price¥19,800
Paraiba Tourmaline from Brazil, 0.034ct Loose (CuO: 1.8%, MnO: 2.4%)
Sale price¥29,800
Paraiba Tourmaline from Brazil 0.067 ct loose (CuO: 1.4%, MnO: 2.4%)
Sale price¥45,800
Ethiopian Opal 5.2mm/0.688ct Loose (Sphere)
Sale price¥6,980
Brazilian Paraiba Tourmaline 0.037ct Loose (CuO:1.9%, MnO:2.3%)
Sale price¥39,800
Russian diamond rough (sawable) 0.094ct rough
Sale price¥24,800
Mozambique Pink Tourmaline 1.122ct Loose Stone (Contains CuO)
Sale price¥39,800
Pink sapphire 0.271ct loose stone
Sale price¥8,800
Yellow Sapphire 4.0mm/0.266ct Loose
Sale price¥12,800
Purple sapphire 4mm/0.273ct loose stone
Sale price¥12,800
Pink sapphire 4.5mm/0.390ct loose stone
Sale price¥15,800
Violet Sapphire 4.3mm/0.328ct Loose
Sale price¥15,800
Brazilian Sky Blue Topaz (untreated) 2.116ct loose stone
Sale price¥15,800
Brazilian Sky Blue Topaz (untreated) 1.376ct loose stone
Sale price¥12,800
Madagascar Yellow Sapphire 0.863ct Loose
Sale price¥18,800
Brazilian bicolor tourmaline 0.502ct loose stone
Sale price¥12,800
YAG (Yttrium Aluminum Garnet) 6.5mm/1.551ct Loose Stone
Sale price¥19,800
Silky Sapphire from Sri Lanka 1.716ct loose stone
Sale price¥14,800
Sri Lankan Silky Sapphire 6.4mm/1.036ct Loose Stone
Sale price¥12,800
Tanzania Color Change Garnet 0.789ct Loose Stone
Sale price¥9,800
Brazilian bicolor tourmaline 1.248ct loose stone
Sale price¥18,800
Brazilian Trapiche Amethyst 10.855ct loose stone
Sale price¥6,980
Green tourmaline 0.512ct loose stone
Sale price¥9,800
Brazilian Rubellite Cat's Eye 1.180ct Loose Stone
Sale price¥29,800
Mexican Fire Opal 1.222ct Loose (Faceted Cut)
Sale price¥12,800
Mexican Fire Opal 0.576ct Loose (Faceted Cut)
Sale price¥9,800
Colombian emerald 0.231ct loose stone
Sale price¥28,800
Mozambique Rubellite 2.141ct Loose Stone
Sale price¥69,800
Mozambique rubellite 2.752ct loose stone
Sale price¥69,800
Brazilian Rubellite 1.027ct Loose Stone
Sale price¥69,800
Colombian pyrite-mica emerald 0.628ct loose stone
Sale price¥35,800
Colombian pyrite-mica emerald 0.739ct loose stone
Sale price¥36,800
Diamond 0.128ct loose stone (cabochon cut, maroon cut)
Sale price¥39,800
Brazilian Rubellite 3.845ct loose stone
Sale price¥198,000
Australian black opal 9.709ct loose stone
Sale price¥158,000
Brazilian parti-color tourmaline 2.702ct loose stone
Sale price¥69,800
Pt950 Brazilian Paraiba Tourmaline Ring (Fluid Setting, Oval Cut)
Sale price¥64,800
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.