Birthstone list
Tanzanian Rhodolite Garnet 0.643ct Loose Stone
Sale price¥6,980
Tanzanian Rhodolite Garnet 0.391ct Loose Stone
Sale price¥6,980
Brazilian Aquamarine 0.214ct Loose Stone (Princess Cut)
Sale price¥6,980
Brazilian Aquamarine 0.228ct Loose Stone
Sale price¥6,980
Brazilian Aquamarine 0.239ct Loose Stone (Princess Cut)
Sale price¥8,800
Brazilian Aquamarine 0.463ct Loose Stone
Sale price¥6,980
Brazilian Aquamarine 0.255ct Loose Stone
Sale price¥6,980
Brazilian Aquamarine 0.238ct Loose Stone (Princess Cut)
Sale price¥5,980
Brazilian Aquamarine 0.223ct Loose Stone
Sale price¥8,800
Brazilian Aquamarine 0.287ct Loose Stone
Sale price¥6,980
Madagascar sapphire 0.503ct loose stone
Sale price¥15,800
Madagascar sapphire 0.289ct loose stone
Sale price¥12,800
0.324ct loose pink sapphire from Madagascar
Sale price¥12,800
Opal 426.985ct rough stone
Sale price¥29,800
Mexican Cantera Opal 4.456ct Loose
Sale price¥39,800
Mexican Hyalite Opal 1.587ct Loose
Sale price¥9,800
[12541081 published] Emerald 9.380ct rough stone
Sale price¥4,980
Black opal 2.293ct loose
Sale price¥98,000
Yellow sapphire from Sri Lanka 6mm/0.962ct loose
Sale price¥18,800
Yellow sapphire from Sri Lanka 6mm/0.816ct loose
Sale price¥18,800
Ruby from Greenland 0.268ct loose with certificate
Sale price¥18,800
Pink sapphire from Greenland 0.754ct loose with certificate
Sale price¥25,800
Montana Sapphire 2.8mm/0.098ct Loose Stone (Yellow)
Sale price¥6,980
Montana Sapphire 1.9mm/0.033ct loose
Sale price¥4,980
Tanzanite 2.418ct loose
Sale price¥55,800
Bicolor sapphire 0.853ct loose stone
Sale price¥9,800
Opal 21.584ct loose Japanese and German
Sale price¥8,800
Paraiba tourmaline from Brazil 0.252ct loose (CuO:0.9%, MnO:2.0%)
Sale price¥29,800
Cantera opal 14.581ct loose
Sale price¥22,800
South African green diamond rough (makeable) 0.298ct loose
Sale price¥69,800
Tanzanite 2.726ct loose
Sale price¥110,000
Bicolor imperial topaz 1.725ct loose
Sale price¥79,800
Green opal 15.950ct loose
Sale price¥29,800
Australian boulder opal 13.190ct loose
Sale price¥18,800
Yellow tourmaline 2.290ct loose
Sale price¥8,800
Brazilian Aquamarine 0.627ct Loose Stone
Sale price¥6,980
Ethiopian Opal 6.6mm/0.635ct Loose
Sale price¥9,800
Mexican Fire Opal (Faceted) 5.5mm/0.447ct Loose Stone
Sale price¥12,800
Mexican fire opal (faceted cut) 0.417ct loose stone
Sale price¥8,800
Mexican fire opal (faceted cut) 0.198ct loose stone
Sale price¥8,800
Mexican fire opal (faceted cut) 0.515ct loose stone
Sale price¥12,800
Mexican fire opal (faceted cut) 0.167ct loose stone
Sale price¥8,800
Pakistani Peridot 0.410ct Loose Stone
Sale price¥6,980
American Peridot 0.458ct Loose Stone
Sale price¥6,980
0.060ct loose, oil-free emerald from Madagascar, GIA
Sale price¥69,800
Afghanistan Oil-Free Emerald 0.100ct Loose GIA
Sale price¥98,000
Salt and Pepper Diamond 5.2mm/0.863ct Loose (Cabochon Cut)
Sale price¥98,000
Sri Lankan Yellow Sapphire 0.300ct 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.
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.