Birthstone list
[On sale 9/26 at 22:00] Mexican Cantera Opal 9.166ct loose gemstone
Sale price¥29,800
[Available 9/19 at 10 PM] Mexican Cantera Opal 24.256ct Loose Stone
Sale price¥69,800
[Available 9/19 at 10:00 PM] 1.645ct Colombian Emerald Rough Stone
Sale price¥49,800
[On sale 9/20 at 10 PM] Indian Black Moonstone 0.882ct Loose Stone
Sale price¥8,800
【Available 9/22, 10:00 PM】 Colombian Emerald 0.078ct Loose Gemstone
Sale price¥18,800
[9/22, 10 PM Sale] Malawi Moonstone 4.333ct Loose Gemstone
Sale price¥19,800
[9/23 10 PM Sale] Mexican Fire Opal 0.824ct Loose Gemstone
Sale price¥12,800
[Available 9/24 at 10 PM] Australian Black Opal 0.322ct Loose Gemstone
Sale price¥16,800
[Available Sept. 21, 10:00 PM] Colombian Emerald 0.267ct Loose Gemstone
Sale price¥39,800
[Available 9/21, 10:00 PM] Colombian Emerald 0.152ct Loose Gemstone
Sale price¥25,800
[On sale 9/21 at 22:00] Ruby 0.176ct Loose Stone
Sale price¥15,800
[Available 9/27 at 10 PM] Brazilian Bicolor Topaz 1.932ct Loose Stone
Sale price¥19,800
Brazilian Rubellite 3.845ct loose stone
Sale price¥158,000
Diamond 0.128ct loose stone (cabochon cut, maroon cut)
Sale price¥45,800
Colombian pyrite-mica emerald 0.628ct loose stone
Sale price¥29,800
Brazilian Rubellite 1.027ct Loose Stone
Sale price¥69,800
Mozambique rubellite 2.752ct loose stone
Sale price¥69,800
Mozambique Rubellite 2.141ct Loose Stone
Sale price¥69,800
Colombian emerald 0.231ct loose stone
Sale price¥25,800
YAG (Yttrium Aluminum Garnet) 6.5mm/1.551ct Loose Stone
Sale price¥15,800
American Herkimer Diamond 5.6mm/0.516ct Loose
Sale price¥8,800
Colombian Trapiche Emerald 0.299ct Loose
Sale price¥16,800
Sri Lankan glass body (sapphire crystal) 7.983ct rough stone
Sale price¥19,800
Sri Lankan glass body (sapphire crystal) 9.933ct rough stone
Sale price¥29,800
Sri Lankan glass body (sapphire crystal) 10.140ct rough stone
Sale price¥22,800
YAG (Yttrium Aluminum Garnet) 7mm/1.686ct Loose Stone
Sale price¥12,800
Almandine garnet 2.421ct loose
Sale price¥16,800
Russian demantoid garnet (horsetail recognized) 5.5mm/0.710ct loose
Sale price¥188,000
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.
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.