Birthstone list
Brazilian Paraiba Tourmaline 0.230ct Loose GIA (CuO: 0.9%, MnO: 1.1%)
Sale price¥158,000
K18 Indian Iolite Sunstone 0.73ct Tanzanite Ring
Sale price¥188,000
K18/Pt950 Cambodian Blue Zircon 0.48ct Paraiba Tourmaline Ring
Sale price¥89,800
Brazilian Paraiba Tourmaline 0.136ct loose stone (CuO: 1.8%, MnO: 2.0%)
Sale price¥39,800
Australian Boulder Opal 23.164ct Loose
Sale price¥128,000
Mozambique rubellite 2.752ct loose stone
Sale price¥69,800
Mozambique Rubellite 2.141ct Loose Stone
Sale price¥69,800
Madagascar Padparadscha Sapphire 0.208ct Loose DGL
Sale price¥34,800
Colombian emerald 0.191ct loose
Sale price¥22,800
Colombian emerald 0.231ct loose stone
Sale price¥28,800
Mexican Fire Opal 0.576ct Loose (Faceted Cut)
Sale price¥9,800
Mexican Fire Opal 0.212ct Loose (Faceted Cut)
Sale price¥8,800
Mexican Fire Opal 1.222ct Loose (Faceted Cut)
Sale price¥12,800
Mexican Fire Opal 0.213ct Loose (Faceted Cut)
Sale price¥9,800
Mexican Fire Opal 0.356ct Loose (Faceted Cut)
Sale price¥9,800
Brazilian Rubellite Cat's Eye 1.180ct Loose Stone
Sale price¥29,800
Green tourmaline 0.512ct loose stone
Sale price¥9,800
Brazilian Trapiche Amethyst 10.855ct loose stone
Sale price¥6,980
Brazilian Trapiche Amethyst 14.949ct loose stone
Sale price¥8,800
Brazilian bicolor tourmaline 1.248ct loose stone
Sale price¥18,800
Tanzanite from Tanzania 0.492ct loose stone
Sale price¥14,800
Tanzania Color Change Garnet 0.789ct Loose Stone
Sale price¥9,800
Nigerian Aventurine Aquamarine 1.164ct Loose Stone
Sale price¥12,800
Sri Lankan Silky Sapphire 6.4mm/1.036ct Loose Stone
Sale price¥12,800
Silky Sapphire from Sri Lanka 1.716ct loose stone
Sale price¥14,800
Tanzanite from Tanzania 1.250ct loose stone
Sale price¥22,800
YAG (Yttrium Aluminum Garnet) 6.5mm/1.551ct Loose Stone
Sale price¥19,800
Brazilian bicolor tourmaline 0.502ct loose stone
Sale price¥12,800
Madagascar Yellow Sapphire 0.863ct Loose
Sale price¥18,800
Nigerian Aventurine Aquamarine 0.471ct Loose Stone
Sale price¥8,800
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
Tanzanian Mint Garnet 1.276ct Loose Stone
Sale price¥69,800
Montana Sapphire 0.405ct Loose (Green Sapphire)
Sale price¥9,800
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.