Birthstone list
0.933 ct loose Mozambican rubellite
Sale price¥25,800
Mexican Opal (Faceted) 0.208ct Loose Stone
Sale price¥9,800
Colombian emerald 0.159ct loose stone
Sale price¥47,800
Paraiba tourmaline from Brazil 0.162ct loose
Sale price¥69,800
Paraiba tourmaline from Brazil 0.097ct loose
Sale price¥22,800
Tanzanite from Tanzania 0.889ct loose stone
Sale price¥18,800
Tanzanian Tanzanite 4.3mm/0.311ct Loose Stone
Sale price¥12,800
Tanzanian Rhodolite Garnet 9.2mm/4.174ct Loose Stone
Sale price¥29,800
Tanzanian Rhodolite Garnet 9.3mm/4.393ct Loose Stone
Sale price¥29,800
Tanzanite 0.579ct loose stone from Tanzania
Sale price¥5,980
Tanzanian Lavender Tanzanite 0.391ct Loose Stone
Sale price¥12,800
Pigeon Blood Ruby 4.6mm/0.490ct Loose
Sale price¥128,000
Pigeon Blood Ruby 0.250ct Loose Stone
Sale price¥79,800
0.343 ct Tanzanite Loose Gemstone from Tanzania
Sale price¥8,800
0.296ct Loose Tanzanite from Tanzania
Sale price¥12,800
Russian Demantoid Garnet (Horsetail Inclusions) 4.7mm/0.445ct Loose
Sale price¥69,800
Colombian emerald 3.1mm/0.093ct loose stone
Sale price¥22,800
Green tourmaline 1.258ct loose
Sale price¥29,800
Bicolor star sapphire from Myanmar 0.920ct loose
Sale price¥39,800
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
Paraiba tourmaline from Brazil 0.039ct loose (CuO:1.5%, MnO:2.0%)
Sale price¥24,800
Paraiba tourmaline from Brazil 0.032ct loose (CuO:2.2%, MnO:1.8%)
Sale price¥25,800
Paraiba tourmaline from Brazil 0.062ct loose (CuO:1.4%, MnO:1.5%)
Sale price¥39,800
Paraiba tourmaline from Mozambique 1.057ct loose
Sale price¥29,800
Paraiba tourmaline from Brazil 0.117ct loose
Sale price¥39,800
South African yellow diamond (makeable) 0.159ct rough stone
Sale price¥12,800
Bekily Blue Garnet from Madagascar (color change garnet) 0.297ct loose
Sale price¥19,800
Opal 6mm/0.590ct loose (rose cut)
Sale price¥5,980
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
Benitoite 0.091ct loose (emerald cut)
Sale price¥25,800
Rubellite 7.068ct loose Japanese-German book
Sale price¥498,000
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
Brazilian indicolite tourmaline 0.691ct loose stone
Sale price¥19,800
Brazilian indicolite tourmaline 0.386ct loose stone
Sale price¥9,800
Brazilian indicolite tourmaline 0.750ct loose stone
Sale price¥15,800
Ubaite/dravite tourmaline 3.157ct rough stone
Sale price¥6,980
Mexican cantera opal 17.528ct loose
Sale price¥29,800
Blue Sapphire 5.0mm/0.552ct Loose Stone
Sale price¥18,800
USA origin Peridot, 0.496 ct, 2-stone matched pair, loose
Sale price¥12,800
American Peridot 0.969ct Loose Stone
Sale price¥25,800
Tanzanian Mandarin Garnet 0.352ct Loose Stone
Sale price¥18,800
Mexican Fire Opal 0.191ct Loose (Faceted Cut)
Sale price¥12,800
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.