Tanzanian Lavender Tanzanite 0.391ct Loose Stone
Sale price¥12,800
0.343 ct Tanzanite Loose Gemstone from Tanzania
Sale price¥8,800
0.296ct Loose Tanzanite from Tanzania
Sale price¥12,800
Afghan Diaspore 0.239ct Loose
Sale price¥15,800
Russian Demantoid Garnet (Horsetail Inclusions) 4.7mm/0.445ct Loose
Sale price¥69,800
Green tourmaline 1.258ct loose
Sale price¥29,800
Paraiba tourmaline from Brazil 0.129ct loose (Cu:0.6%,MnO:0.9%)
Sale price¥29,800
Green tourmaline 0.389ct loose
Sale price¥8,800
South African yellow diamond (makeable) 0.159ct rough stone
Sale price¥12,800
Kazakhstan Golden Hill Turquoise 2.314ct Loose Stone
Sale price¥7,980
Canadian rough diamond (sawable) 0.096ct rough with trigon
Sale price¥29,800
Brazilian unheated particolor Paraiba tourmaline 0.84ct loose GIA
Sale price¥2,580,000
Silky diamond 2.7mm/0.086ct loose
Sale price¥9,800
Silky diamond 2.8mm/0.097ct loose
Sale price¥9,800
Ubaite/dravite tourmaline 3.157ct rough stone
Sale price¥6,980
0.939 ct Loose Imperial Topaz from Brazil with Certificate
Sale price¥29,800
Uncut Canadian diamond (sawable) 0.103ct
Sale price¥29,800
Paraiba tourmaline from Brazil 0.132ct loose (CuO:2.1%.MnO:2.2%)
Sale price¥188,000
South African yellow diamond (makeable) 0.202ct rough stone
Sale price¥15,800
South African gray diamond (makeable) 0.169ct rough stone
Sale price¥14,800
Tanzanite from Tanzania 0.467ct loose stone
Sale price¥9,800
Tanzanite from Tanzania 0.436ct loose stone
Sale price¥8,800
Brazilian green tourmaline 1.233 ct loose stone
Sale price¥69,800
Tanzanite from Tanzania 0.730ct loose stone
Sale price¥29,800
Kenyan Tsavorite 1.026ct Loose Stone
Sale price¥98,000
Tanzanite from Tanzania 0.680ct loose stone
Sale price¥15,800
Demantoid garnet 15.468ct rough stone from Madagascar
Sale price¥9,800
Paraiba tourmaline from Brazil 0.243ct loose
Sale price¥14,800
Paraiba tourmaline from Mozambique 0.270ct loose
Sale price¥18,800
Rough diamond (sawable) 0.466ct rough diamond (with trigon)
Sale price¥98,000
Diamond rough (makeable) 0.204ct rough
Sale price¥39,800
0.604ct rough diamond
Sale price¥12,800
Brazilian green tourmaline 4.345ct loose stone
Sale price¥69,800
Tanzanite from Tanzania 2.777ct loose stone
Sale price¥98,000
Brazilian Blue Tourmaline 0.827ct Loose Stone
Sale price¥19,800
Brazilian Dumortierite in Quartz 0.382ct Loose Stone
Sale price¥9,800
Brazilian Paraiba Tourmaline 0.115ct Loose (CuO:2.0%, MnO:0.6%)
Sale price¥59,800
Mint color tourmaline 0.198ct loose
Sale price¥4,980
Mint color tourmaline 0.229ct loose
Sale price¥4,980
Pink tourmaline 0.205ct loose
Sale price¥4,980
Diaspore 1.209ct loose from Türkiye
Sale price¥15,800
Diaspore from Türkiye 0.636ct loose
Sale price¥9,800
Tourmaline cat's eye 0.910ct loose
Sale price¥4,980
Russian Demantoid Garnet (Horsetail) 4.2mm/0.325ct Loose Stone
Sale price¥59,800
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.