Birthstone list
Non-Oil Emerald 1.070ct Loose Gübelin Certificate
Sale price¥698,000
Brazilian bicolor tourmaline 0.914ct loose stone
Sale price¥12,800
Tanzanite from Tanzania 1.36ct loose stone
Sale price¥49,800
Unheated Ruby 0.330ct Loose AIGS
Sale price¥35,800
Pt900 Colombian emerald 0.72ct, diamond 0.61ct ring
Sale price¥158,000
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
Burmese unheated ruby 0.245ct loose stone by Nikkei
Sale price¥39,800
Myanmar Ruby 0.283ct Loose
Sale price¥29,800
Madagascar sapphire 3.0mm/0.126ct loose stone
Sale price¥8,800
Burmese Ruby 0.239ct Loose
Sale price¥9,800
Emerald 0.484ct loose
Sale price¥18,800
Emerald 0.156ct loose stone
Sale price¥8,800
Color shift amethyst 4.191ct loose stone
Sale price¥14,800
Color shift amethyst 1.216ct loose stone
Sale price¥8,800
Madagascar Pink Tourmaline 0.543ct Loose Stone
Sale price¥14,800
Tanzanite from Tanzania 4.6mm/0.429ct loose stone
Sale price¥12,800
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
Hokkaido Opal 12.492ct Loose Patch
Sale price¥7,980
Australian Green Opal 4.990ct Loose
Sale price¥9,800
Brazilian bicolor tourmaline 0.582ct loose stone
Sale price¥6,980
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
Brazilian bicolor tourmaline 1.209ct loose stone
Sale price¥9,800
Brazilian bicolor tourmaline 1.910ct loose stone
Sale price¥25,800
Brazilian bicolor tourmaline 1.540ct loose stone
Sale price¥25,800
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
Brazilian Rubellite 2.022ct Loose Stone
Sale price¥55,800
Brazilian Rubellite (Red Tourmaline) 1.525ct Loose Stone
Sale price¥39,800
Tanzanite from Tanzania 0.298ct loose stone
Sale price¥9,800
Tanzanite from Tanzania 0.250ct loose stone
Sale price¥7,980
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.