Brazilian Swiss Blue Topaz 11.536ct Loose
Sale price¥14,800
Brazilian Swiss Blue Topaz 10.958ct Loose
Sale price¥14,800
Brazilian Limonite in Beryl 2.975ct loose stone
Sale price¥5,980
Mexican Cantera Opal 5.126ct Loose
Sale price¥25,800
Mexican Cantera Opal 4.602ct Loose
Sale price¥29,800
Mexican Cantera Opal 1.842ct Loose
Sale price¥39,800
Mexican Cantera Opal 9.909ct Loose
Sale price¥39,800
Mexican Cantera Opal 5.238ct Loose
Sale price¥15,800
Mexican Cantera Opal 7.275ct Loose
Sale price¥35,800
Mexican Cantera Opal 5.261ct Loose
Sale price¥49,800
Brazilian Dendritic Agate 3.079ct Loose Stone
Sale price¥8,800
Colombian emerald rough stone 37.764ct (Gachala mine)
Sale price¥598,000
Brazilian Limonite in Topaz 20.777ct loose stone
Sale price¥39,800
Tanzanian bicolor tanzanite 4.804ct rough stone
Sale price¥18,800
Diamond 3.8mm/0.209 Loose (G, VVS1, 3Excellent H&C)
Sale price¥59,800
Brazilian Limonite in Topaz 8.994ct loose stone
Sale price¥19,800
Ethiopian Opal 41.967ct Rough Stone
Sale price¥33,800
Ethiopian Opal 15.845ct Rough Stone
Sale price¥15,800
Ethiopian Opal 14.344ct Rough Stone
Sale price¥14,800
Brazilian Garden Quartz 5.592ct Loose Stone
Sale price¥12,800
Australian black opal 4.528ct loose
Sale price¥39,800
Brazilian Dendritic Agate 3.016ct Loose Stone
Sale price¥12,800
Brazilian dendritic quartz 2.381ct loose stone
Sale price¥7,980
Brazilian Paraiba Tourmaline in Quartz 2.403ct loose stone
Sale price¥45,800
Brazilian Paraiba Tourmaline in Quartz 1.917ct loose stone
Sale price¥42,800
Brazilian Quartz (Striped Quartz) 15.019ct Loose Patch
Sale price¥8,800
Mexican Cantera Opal 10.927ct Loose
Sale price¥18,800
Mexican Cantera Opal 19.732ct Loose
Sale price¥24,800
Synthetic Opal (Synthetic Black Opal) 1.467ct Loose
Sale price¥12,800
Synthetic Opal (Synthetic Black Opal) 10.910ct Loose
Sale price¥69,800
Synthetic Opal (Synthetic Black Opal) 1.532ct Loose
Sale price¥15,800
Spanish Sphalerite 6.494ct loose stone
Sale price¥69,800
Spanish bicolor sphalerite 5.289ct loose stone
Sale price¥59,800
Tanzania Color Change Chrome Tourmaline 13.194ct Loose Stone Chuhokan
Sale price¥398,000
[Sakura Shape] Mexican Opal 2.551ct Loose Patch
Sale price¥59,800
[Takeshi Yamamoto] Bicolor fluorite 15.624ct loose stone
Sale price¥45,800
[Takeshi Yamamoto] Rose quartz 25.017ct loose stone
Sale price¥59,800
[Takeshi Yamamoto] Ametrine 20.856ct loose stone
Sale price¥98,000
[Takeshi Yamamoto] Rock crystal 78.580ct loose stone
Sale price¥98,000
Brazilian rutilated quartz (rutile quartz) 12mm/7.140ct loose stone
Sale price¥9,800
Brazilian rutilated quartz (rutile quartz) 12mm/6.709ct loose stone
Sale price¥9,800
Brazilian bicolor tourmaline 0.914ct loose stone
Sale price¥12,800
Tanzanite from Tanzania 1.36ct loose stone
Sale price¥49,800
Burmese Ruby 0.418ct Loose Stone Japan-Germany
Sale price¥35,800
Myanmar Ruby 0.283ct Loose
Sale price¥29,800
Emerald 0.484ct loose
Sale price¥18,800
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.