Birthstone list
Brazilian Sky Blue Topaz (untreated) 1.376ct loose stone
Sale price¥12,800
Brazilian Sky Blue Topaz (untreated) 2.116ct loose stone
Sale price¥15,800
Vietnam Aquamarine 6.0mm/0.781ct Loose Stone
Sale price¥8,800
Violet Sapphire 4.3mm/0.328ct Loose
Sale price¥15,800
Pink sapphire 4.5mm/0.390ct loose stone
Sale price¥15,800
Purple sapphire 4mm/0.273ct loose stone
Sale price¥12,800
Yellow Sapphire 4.0mm/0.266ct Loose
Sale price¥12,800
Pink sapphire 0.271ct loose stone
Sale price¥8,800
Montana Sapphire 0.405ct Loose (Green Sapphire)
Sale price¥9,800
Mozambique Pink Tourmaline 1.122ct Loose Stone (Contains CuO)
Sale price¥39,800
Brazilian Paraiba Tourmaline 0.759ct rough stone
Sale price¥45,800
Russian diamond rough (sawable) 0.094ct rough
Sale price¥24,800
Colombian pyrite-mica emerald 3.208ct loose stone
Sale price¥228,000
Sri Lankan Star Sapphire 5.225ct Loose
Sale price¥98,000
Colombian Trapiche Emerald 0.291ct Loose
Sale price¥15,800
Colombian Mica in Emerald 4.6mm/0.210ct Loose Stone
Sale price¥12,800
Colombian Trapiche Emerald 0.147ct Loose
Sale price¥9,800
Colombian mint color emerald 0.178ct loose stone
Sale price¥6,980
Colombian Trapiche Emerald 0.416ct Loose
Sale price¥22,800
Ethiopian Opal 5.2mm/0.688ct Loose (Sphere)
Sale price¥6,980
K18PG Brazilian Paraiba Tourmaline 0.286ct Grandidierite Ring GIA
Sale price¥198,000
Pt950 South Sea pearl 9.586ct, alexandrite, kornerupine, diamond ring
Sale price¥198,000
Colombian Trapiche Emerald 0.266ct Loose
Sale price¥14,800
Mexican Cantera Opal 4.835ct Loose
Sale price¥19,800
American Herkimer Diamond 5.6mm/0.516ct Loose
Sale price¥9,800
Brazilian Paraiba Tourmaline 0.200ct loose stone (CuO: 1.7%, MnO: 2.8%)
Sale price¥98,000
Brazilian Paraiba Tourmaline 0.821ct rough stone
Sale price¥39,800
Tanzanian bicolor tanzanite rough stone 2.750ct
Sale price¥9,800
Colombian Trapiche Emerald 0.372ct Loose
Sale price¥19,800
Colombian Trapiche Emerald 0.299ct Loose
Sale price¥16,800
Russian rough diamond (sawable) 0.098ct loose
Sale price¥24,800
Tanzanite from Tanzania 0.262ct loose stone
Sale price¥8,800
Colombian pyrite emerald 13.691ct loose stone
Sale price¥398,000
Brazilian Green Tourmaline 26.071ct Loose Stone (Sugarloaf Cut)
Sale price¥298,000
Brazilian bicolor tourmaline 6.928ct loose stone (bicolor blue tourmaline)
Sale price¥298,000
Colombian pyrite emerald 8.044ct loose stone
Sale price¥188,000
Australian Shell Opal (Shell Opal) 73.321ct Rough Stone
Sale price¥49,800
Colombian Trapiche Emerald 0.392ct Loose
Sale price¥19,800
Canary Yellow Tourmaline from Mozambique 0.223ct loose stone
Sale price¥8,800
Colombian Trapiche Emerald 0.260ct Loose
Sale price¥14,800
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.