Birthstone list
[Cat cut] Amazon green opal 6.5mm/0.580ct loose
Sale price¥9,800
[Mr. NOBU] Green Opal from Amazon [Collaboration] 6.8mm loose
Sale price¥9,800
Bangkacha sapphire (star sapphire) 69.655ct loose
Sale price¥198,000
Mexican Topaz 1.50ct Loose
Sale price¥15,800
Russian demantoid garnet (horsetail recognized) 4.2mm/0.319ct loose
Sale price¥69,800
Pink tourmaline 0.158ct loose
Sale price¥8,800
Russian demantoid garnet (horsetail recognized) 5.3mm/0.633ct loose
Sale price¥248,000
Pigeon Blood Ruby 0.590ct Loose AIGS
Sale price¥55,800
Pink tourmaline 0.391ct loose
Sale price¥5,980
Russian demantoid garnet (horsetail recognized) 5.8mm/0.876ct loose
Sale price¥298,000
[Cat cut] Blue green tourmaline 5.5mm loose
Sale price¥12,800
Fire opal 1.360ct loose
Sale price¥25,800
Brazilian Blue Topaz 14.890ct Loose
Sale price¥14,800
Cantera Opal 8.678ct loose
Sale price¥35,800
Cantera opal 17.284ct loose
Sale price¥39,800
Particolor tourmaline 32.207ct loose (tricolor tourmaline)
Sale price¥398,000
Bicolor tourmaline 3.277ct loose
Sale price¥9,800
Watermelon tourmaline 44.201ct Ruth Japanese-German book
Sale price¥398,000
Green sapphire 7.545ct loose (spade cut)
Sale price¥69,800
Paraiba tourmaline from Brazil 0.134ct loose (CuO:0.8%, MnO:2.3%)
Sale price¥29,800
Russian demantoid garnet (horsetail recognized) 4.6mm/0.423ct loose
Sale price¥98,000
Tanzanite 1.360ct loose stone
Sale price¥49,800
Russian demantoid garnet (horsetail recognized) 4.4mm/0.394ct loose
Sale price¥88,800
Cantera Opal 46.175ct loose
Sale price¥19,800
Ice blue sapphire 3.813ct loose
Sale price¥49,800
Bicolor tourmaline 3.080ct loose
Sale price¥14,800
Star sapphire 0.973ct loose
Sale price¥5,980
Trapiche emerald 0.650ct loose (reverse trapiche)
Sale price¥8,800
Australian opal 14.837ct loose
Sale price¥118,000
Mexican Fire Opal 1.30ct Loose
Sale price¥6,980
Bicolor tourmaline 1.097ct loose
Sale price¥6,980
Bicolor tourmaline 1.248ct loose
Sale price¥8,800
Mexican Opal 8mm/1.430ct Loose
Sale price¥39,800
Russian demantoid garnet (horsetail recognized) 4.2mm/0.336ct loose
Sale price¥98,000
Colombian mica in emerald 1.314ct loose
Sale price¥39,800
Brazilian Paraiba tourmaline 0.065ct loose (CuO:2.0%, MnO:2.6%)
Sale price¥25,800
Russian demantoid garnet (horsetail recognized) 0.214ct loose
Sale price¥59,800
Brazilian Pink Imperial Topaz 1.907ct Loose Japanese-German Edition
Sale price¥118,000
Paraiba tourmaline from Brazil 0.240ct loose (CuO:0.7%, MnO:3.8%)
Sale price¥59,800
Paraiba tourmaline from Brazil 0.232ct loose
Sale price¥58,800
Paraiba tourmaline from Brazil 0.239ct loose
Sale price¥59,800
Paraiba tourmaline from Brazil 0.204ct loose
Sale price¥36,800
Paraiba tourmaline from Brazil 0.086ct loose (CuO:1.5%, MnO:2.3%)
Sale price¥19,800
Paraiba tourmaline from Brazil 0.226ct loose (CuO:0.7%, MnO:3.6%)
Sale price¥49,800
Paraiba tourmaline from Brazil 0.167ct loose (CuO:1.6%, MnO:3.0%)
Sale price¥35,800
Paraiba tourmaline from Brazil 0.205ct loose (CuO:0.8%, MnO:3.1%)
Sale price¥45,800
Leuko garnet from Myanmar 0.294ct loose
Sale price¥19,800
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.
業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。
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.