Birthstone list
Mexican Water Opal (Faceted) 0.215ct Loose (Contrarus Opal)
Sale price¥18,800
Tanzanian Dragon Garnet 1.042ct Loose Stone
Sale price¥28,800
Colombian emerald 0.091ct loose stone
Sale price¥15,800
Sri Lankan Twin Star Sapphire 3.928ct Loose
Sale price¥128,000
Sri Lankan triple star sapphire 1.743ct loose stone
Sale price¥128,000
Sri Lankan Twin Star Sapphire 5.225ct Loose
Sale price¥98,000
Brazilian Blue Tourmaline 0.827ct Loose Stone
Sale price¥19,800
Brazilian green tourmaline 4.345ct loose stone
Sale price¥69,800
0.604ct rough diamond
Sale price¥12,800
Diamond rough (makeable) 0.204ct rough
Sale price¥39,800
Mexican Water Opal 1.790ct Loose (Contralus Opal)
Sale price¥29,800
Paraiba tourmaline from Mozambique 0.270ct loose
Sale price¥18,800
Demantoid garnet 15.468ct rough stone from Madagascar
Sale price¥9,800
Tanzanite from Tanzania 0.680ct loose stone
Sale price¥15,800
Kenyan Tsavorite 1.026ct Loose Stone
Sale price¥98,000
Tanzanite from Tanzania 0.730ct loose stone
Sale price¥29,800
Brazilian green tourmaline 1.233 ct loose stone
Sale price¥69,800
Sri Lankan Bicolor Sapphire 0.607ct Loose Stone
Sale price¥15,800
0.257ct Unheated Silky Pink Sapphire from Vietnam
Sale price¥12,800
Tanzanian Bicolor Grossular Garnet 2.997ct Loose Stone
Sale price¥69,800
Tanzanite from Tanzania 0.436ct loose stone
Sale price¥8,800
Tanzanite from Tanzania 0.467ct loose stone
Sale price¥9,800
South African gray diamond (makeable) 0.169ct rough stone
Sale price¥14,800
South African yellow diamond (makeable) 0.202ct rough stone
Sale price¥15,800
American Benitoite 0.104ct Loose Stone (Emerald Cut)
Sale price¥29,800
American Benitoite 0.107ct Loose Stone (Emerald Cut)
Sale price¥35,800
American Benitoite 0.123ct Loose Stone (Emerald Cut)
Sale price¥39,800
Brazilian ametrine 8.849ct loose
Sale price¥12,800
Uncut Canadian diamond (sawable) 0.103ct
Sale price¥29,800
Mexican Fire Opal 0.191ct Loose (Faceted Cut)
Sale price¥12,800
Tanzanian Mandarin Garnet 0.352ct Loose Stone
Sale price¥18,800
USA origin Peridot, 0.496 ct, 2-stone matched pair, loose
Sale price¥12,800
Blue Sapphire 5.0mm/0.552ct Loose Stone
Sale price¥18,800
Mexican cantera opal 17.528ct loose
Sale price¥29,800
Ubaite/dravite tourmaline 3.157ct rough stone
Sale price¥6,980
Brazilian indicolite tourmaline 0.842ct loose stone
Sale price¥15,800
Brazilian indicolite tourmaline 0.750ct loose stone
Sale price¥15,800
Brazilian indicolite tourmaline 0.386ct loose stone
Sale price¥9,800
Brazilian indicolite tourmaline 0.691ct loose stone
Sale price¥19,800
Silky diamond 2.8mm/0.097ct loose
Sale price¥9,800
Rubellite 7.068ct loose Japanese-German book
Sale price¥498,000
Benitoite 0.091ct loose (emerald cut)
Sale price¥25,800
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.