Birthstone list
Tanzanian Tanzanite 1.36ct Loose
Sale price¥49,800
Pt900/Pt850 Australian Black Opal 0.37ct Diamond 0.73ct Necklace
Sale price¥198,000
Burmese Ruby 0.418ct Loose Stone Japan-Germany
Sale price¥35,800
Myanmar Ruby 0.283ct Loose
Sale price¥29,800
Emerald 0.484ct loose
Sale price¥18,800
Madagascar Pink Tourmaline 0.543ct Loose Stone
Sale price¥14,800
Tanzanite from Tanzania 0.478ct loose stone
Sale price¥9,800
Tanzanite from Tanzania 0.351ct loose stone
Sale price¥9,800
Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.170ct Loose
Sale price¥18,800
Montana Sapphire 3.7mm/0.272ct Loose Stone (Blue Sapphire)
Sale price¥9,800
Pakistan Ruby in Quartz 1.429ct Loose Stone
Sale price¥12,800
Australian Black Opal 0.386ct Loose Stone
Sale price¥39,800
YAG (Yttrium Aluminum Garnet) 7.0mm/1.772ct loose stone
Sale price¥9,800
Montana Sapphire (Blue Sapphire) 0.207ct Loose
Sale price¥6,980
Madagascar White Topaz (Needle-in Topaz) 4.086ct Loose
Sale price¥15,800
Brazilian Rubellite (Red Tourmaline) 3.844ct Loose Stone
Sale price¥128,000
Tanzanite from Tanzania 0.250ct loose stone
Sale price¥7,980
Tanzanite from Tanzania 0.321ct loose stone
Sale price¥6,980
Tanzanite from Tanzania 0.250ct loose stone
Sale price¥8,800
Ruby 0.284ct loose
Sale price¥15,800
Brazilian Green Tourmaline 0.703ct Loose Stone
Sale price¥15,800
Brazilian Green Tourmaline 0.764ct Loose Stone
Sale price¥9,800
Sri Lankan Blue Sapphire 0.226ct Loose
Sale price¥14,800
Brazilian bicolor tourmaline 0.675ct loose stone
Sale price¥9,800
Mexican Yellow Opal 0.673ct Loose
Sale price¥8,800
Mexican Yellow Opal 0.428ct Loose
Sale price¥8,800
Sri Lankan Yellow Sapphire 0.261ct Loose
Sale price¥12,800
Sri Lankan White Sapphire 0.385ct Loose
Sale price¥14,800
Brazilian Paraiba Tourmaline 0.167ct loose stone (CuO: 1.1%, MnO: 3.6%)
Sale price¥69,800
Brazilian bicolor tourmaline 3.282ct loose
Sale price¥59,800
Mexican Cantera Opal 5.647ct Loose
Sale price¥19,800
Mexican Cantera Opal 2.809ct Loose
Sale price¥25,800
Mexican Cantera Opal 3.280ct Loose
Sale price¥9,800
Mexican Cantera Opal 4.973ct Loose
Sale price¥15,800
Mexican Cantera Opal 7.460ct Loose
Sale price¥29,800
Mexican Cantera Opal 2.982ct Loose
Sale price¥14,800
Mexican Cantera Opal 1.534ct Loose
Sale price¥8,800
Mexican Cantera Opal 11.105ct Loose
Sale price¥12,800
Bicolor tourmaline 0.840ct loose
Sale price¥22,800
Mexican Fire Opal 0.780ct Loose
Sale price¥12,800
Australian Shell Opal (Shell Opal) 51.801ct Rough Stone
Sale price¥25,800
Brazilian bicolor tourmaline cat's eye 22.056ct loose stone
Sale price¥198,000
Congo Bicolor Tourmaline 3.429ct Loose
Sale price¥128,000
Mozambique Rubellite 1.706ct Loose Stone
Sale price¥39,800
Kenyan Gold Sheen Sapphire 4mm/0.438ct Loose
Sale price¥55,800
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.