Birthstone list
[Sold at 10 PM on September 12th] Ethiopian Opal 6.6mm/0.635ct Loose
Sale price¥9,800
[8/8 22:00] Brazilian Aquamarine 0.627ct Loose Stone
Sale price¥6,980
[On Sale at 10 PM on August 7th] Colombian Emerald Rough Stone 6.590ct
Sale price¥15,800
Yellow tourmaline 2.290ct loose
Sale price¥8,800
Australian boulder opal 13.190ct loose
Sale price¥18,800
Paraiba tourmaline from Brazil 0.055ct loose (CuO:1.5%,MnO:3.2%)
Sale price¥39,800
Paraiba tourmaline from Brazil 0.066ct loose (CuO:1.7%,Mn0:2.1%)
Sale price¥29,800
Green opal 15.950ct loose
Sale price¥29,800
Madeira Citrine 6mm/0.914ct loose
Sale price¥8,800
Bicolor imperial topaz 1.725ct loose
Sale price¥79,800
Tanzanite 2.726ct loose
Sale price¥110,000
South African green diamond rough (makeable) 0.298ct loose
Sale price¥69,800
Cantera opal 14.581ct loose
Sale price¥22,800
Paraiba tourmaline from Brazil 0.252ct loose (CuO:0.9%, MnO:2.0%)
Sale price¥29,800
Opal 21.584ct loose Japanese and German
Sale price¥8,800
Bicolor sapphire 0.853ct loose stone
Sale price¥9,800
Tanzanite 2.418ct loose
Sale price¥55,800
Paraiba tourmaline from Brazil 0.265ct loose (CuO:0.7%, MnO:3.0%)
Sale price¥29,800
Montana Sapphire 1.9mm/0.033ct loose
Sale price¥4,980
Pink tourmaline cat's eye 5.460ct loose
Sale price¥8,800
Brazilian Paraiba tourmaline 0.229ct loose (CuO:0.8%, MnO:2.2%)
Sale price¥39,800
Ruby 0.182ct loose
Sale price¥5,980
Pink sapphire from Greenland 4.3mm/0.465ct loose with certificate
Sale price¥6,980
Ice ruby (pink sapphire) from Greenland 0.416ct loose with certificate
Sale price¥18,800
Pink sapphire from Greenland 0.754ct loose with certificate
Sale price¥25,800
Pink sapphire from Greenland 0.336ct loose with certificate
Sale price¥9,800
Ruby from Greenland 0.268ct loose with certificate
Sale price¥18,800
Yellow sapphire from Sri Lanka 6mm/0.816ct loose
Sale price¥18,800
Yellow sapphire from Sri Lanka 6mm/0.962ct loose
Sale price¥18,800
[Camellia Cut] Ametrine 11mm/4.207ct《Collaboration》Loose with patch
Sale price¥39,800
K18 bicolor sapphire 0.129ct/blue sapphire ring
Sale price¥69,800
Mexican cantera opal 34.760ct loose
Sale price¥39,800
Black opal 2.293ct loose
Sale price¥98,000
[12541081 published] Emerald 9.380ct rough stone
Sale price¥4,980
[Posted 12541074] Emerald 77.265ct rough stone
Sale price¥6,980
Brazilian Paraiba tourmaline 96.184ct raw stone
Sale price¥8,800
[12539978 published] Ametrine 1.386ct loose
Sale price¥45,800
[Posted 12540116] Ethiopian opal 136.601ct rough stone
Sale price¥29,800
Colombian trapiche emerald (reverse trapiche) 0.107ct rough stone
Sale price¥9,800
Colombian emerald cat's eye 0.834ct loose
Sale price¥39,800
Mexican Hyalite Opal 1.587ct Loose
Sale price¥9,800
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.