Birthstone list
Australian boulder opal 1.156ct loose
Sale price¥5,980
Australian boulder opal 0.721ct loose
Sale price¥5,980
Australian boulder opal 0.874ct loose
Sale price¥4,980
Bekily Blue Garnet from Madagascar (color change garnet) 0.346ct loose
Sale price¥25,800
Bicolor tourmaline 0.418ct loose
Sale price¥5,980
Paraiba tourmaline from Brazil 0.144ct loose (CuO:0.9%,MnO:2.8%)
Sale price¥55,800
Bicolor tanzanite 0.492ct raw stone from Tanzania
Sale price¥8,800
Bicolor tanzanite 1.121ct rough stone from Tanzania
Sale price¥8,800
Bicolor tanzanite 1.165ct rough stone from Tanzania
Sale price¥9,800
Unheated Brazilian Paraiba tourmaline 0.108ct loose
Sale price¥128,000
Paraiba tourmaline from Mozambique 0.266ct loose
Sale price¥29,800
Brazilian Paraiba tourmaline 0.370ct loose (CuO:1.0%, MnO:1.2%)
Sale price¥69,800
UV type mint garnet 0.521ct loose
Sale price¥6,980
UV type mint garnet 0.435ct loose
Sale price¥5,980
Mali Garnet (Grossular/Andradite Garnet) 4.5mm/0.497ct Loose
Sale price¥9,800
Mali Garnet (Grossular/Andradite Garnet) 4.7mm/0.655ct Loose
Sale price¥14,800
Colombian pyrite in emerald 7.836ct loose
Sale price¥398,000
Pink zoisite from Tanzania 6.7mm/1.393ct loose (peach tanzanite)
Sale price¥148,000
[Rouge cut] Almandine garnet 1.725ct loose
Sale price¥8,800
Bicolor sapphire 1.030ct loose from Windsor, Tanzania
Sale price¥98,000
Aquamarine 1.574ct loose stone
Sale price¥12,800
Brazilian blue tourmaline 0.376ct loose
Sale price¥8,800
Color change sapphire 0.351ct loose
Sale price¥4,980
Bicolor tourmaline 0.549ct loose (rose cut)
Sale price¥9,800
Bicolor tourmaline 0.669ct loose (rose cut)
Sale price¥9,800
Bicolor tourmaline 0.505ct loose (rose cut)
Sale price¥8,800
Brazilian bicolor tourmaline 3.569ct loose
Sale price¥49,800
Brazilian bicolor tourmaline 3.291ct loose
Sale price¥39,800
Color change sapphire 0.401ct loose
Sale price¥6,980
Color change sapphire 0.283ct loose
Sale price¥4,980
Yellow tourmaline 0.431ct loose stone
Sale price¥5,980
Blue tourmaline from Afghanistan 3.5mm/0.178ct loose
Sale price¥6,980
Blue tourmaline from Afghanistan 0.209ct loose
Sale price¥6,980
Blue tourmaline from Afghanistan 0.213ct loose
Sale price¥5,980
Parasite Peridot (Paracytic Peridot) 0.541ct Loose Japanese-German Edition
Sale price¥256,000
Paraiba tourmaline from Brazil 0.211ct loose (CuO:0.6%,MnO:3.1%)
Sale price¥49,800
Paraiba tourmaline from Brazil 0.101ct loose (CuO:0.9%,MnO:0.1%)
Sale price¥39,800
Paraiba tourmaline from Brazil 0.129ct loose (CuO:0.8%,MnO:0.1%)
Sale price¥48,800
Brazilian emerald cat's eye 0.459ct loose
Sale price¥6,980
Goethite in Amethyst 0.806ct loose stone
Sale price¥6,980
Bicolor tourmaline 4.118ct loose
Sale price¥69,800
Bicolor tourmaline 0.707ct loose
Sale price¥14,800
Bicolor tourmaline 1.140ct loose
Sale price¥25,800
Blue Topaz 4.5mm/0.422ct Loose
Sale price¥3,980
Blue Topaz 5.1mm/0.511ct Loose
Sale price¥4,980
Brazilian emerald 3.3mm/0.119ct loose
Sale price¥22,800
Bicolor tourmaline 5.825ct loose
Sale price¥128,000
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.