Birthstone list
Australian opal 0.286ct loose
Sale price¥6,980
[Camellia cut] Opal 14mm/5.283ct loose with patch
Sale price¥98,000
[Rouge cut] Almandine garnet 2.076ct loose
Sale price¥12,800
[Rouge cut] Almandine garnet 2.090ct loose
Sale price¥12,800
Paraiba tourmaline from Mozambique 0.229ct loose
Sale price¥12,800
Brazilian Paraiba tourmaline 0.420ct raw stone (CuO:1.6%, MnO:1.3%)
Sale price¥98,000
Colombian emerald cat's eye 0.110ct loose
Sale price¥12,800
Paraiba tourmaline from Mozambique 0.274ct loose
Sale price¥15,800
Paraiba tourmaline from Mozambique 0.257ct loose
Sale price¥12,800
Paraiba tourmaline from Mozambique 0.215ct loose
Sale price¥12,800
Diamond 0.052ct loose (trapeze cut, VS class equivalent)
Sale price¥8,800
Mexican Fire Opal 4.5mm/0.244ct Loose
Sale price¥12,800
Indigolite tourmaline 0.260ct loose Japanese-German book
Sale price¥18,800
Paraiba tourmaline from Mozambique 0.207ct loose
Sale price¥12,800
Paraiba tourmaline from Mozambique 0.256ct loose
Sale price¥18,800
Paraiba tourmaline from Brazil 0.34ct loose GIA
Sale price¥59,800
Bicolor grossular garnet 0.782ct loose
Sale price¥16,800
White topaz 16.06ct loose
Sale price¥29,800
Yellow opal 17.283ct loose
Sale price¥34,800
Australian boulder opal 4.470ct loose
Sale price¥29,800
Brazilian Paraiba tourmaline in quartz 2.954ct loose
Sale price¥45,800
Labradorite Moonstone 1.598ct Loose Stone Japanese-German
Sale price¥9,800
Sri Lankan star sapphire 21.730ct loose
Sale price¥69,800
Purple Diamond 0.070ct Loose (FANCY VIVID PINK PURPLE, I-1)
Sale price¥188,000
Tanzanite 1.297ct loose
Sale price¥12,960
Tanzanite 1.593ct loose
Sale price¥15,800
Fire opal 7mm/1.030ct loose stone
Sale price¥39,800
Sri Lankan Goethite Into Topaz 3.200ct loose
Sale price¥7,980
Australian boulder opal 6.980ct loose
Sale price¥7,980
Australian boulder opal 1.730ct loose
Sale price¥9,800
Mexican cantera opal 7.563ct loose
Sale price¥19,800
Mexican cantera opal 9.422ct loose
Sale price¥29,800
Mexican cantera opal 15.542ct loose
Sale price¥19,800
Yellow diamond rough stone (makeable) 0.247ct rough stone
Sale price¥22,800
Chrome tourmaline 0.300ct loose stone
Sale price¥3,980
Australian black opal 2.122ct loose
Sale price¥24,800
Bicolor tanzanite 0.581ct loose
Sale price¥23,800
Pink tourmaline 1.690ct loose
Sale price¥39,800
Mexican Hyalite Opal 13.614ct rough stone
Sale price¥15,800
Mexican Hyalite Opal 63.479ct rough stone
Sale price¥19,800
Bicolor grossular garnet from Tanzania 2.454ct loose
Sale price¥12,800
Bicolor sapphire 0.190ct loose
Sale price¥6,980
Bicolor sapphire 0.207ct loose
Sale price¥6,980
Bicolor sapphire 0.231ct loose
Sale price¥6,980
Brazilian bicolor tourmaline 7.489ct loose
Sale price¥49,800
Almandine garnet 2.964ct loose
Sale price¥15,800
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.