Less than 0.1ct

Brazilian Alexandrite 0.089ct loose stone (princess cut) Sale price¥19,800

German Awinite 0.076ct loose stone Sale price¥18,800

Paraiba tourmaline from Brazil 0.038ct loose Sale price¥19,800

Paraiba tourmaline from Brazil 0.036ct loose Sale price¥14,800

Unheated Brazilian Paraiba Tourmaline 0.073ct loose stone (CuO: 1.8%, MnO: 2.5%) Sale price¥59,800

Unheated Brazilian Paraiba Tourmaline 0.064ct loose stone (CuO: 1.8%, MnO: 2.1%) Sale price¥59,800

Unheated Brazilian Paraiba Tourmaline 0.043ct loose stone (CuO: 1.2%, MnO: 2.3%) Sale price¥45,800

Unheated Brazilian Paraiba Tourmaline 0.044ct loose stone (CuO: 1.6%, MnO: 2.8%) Sale price¥39,800

Pakistani Veirinite 0.096ct loose stone Sale price¥12,800

Colombian emerald 3.1mm/0.097ct loose Sale price¥22,800

Vietnam Cobalt Spinel (Color Shift) 0.022ct Loose Stone, Japan-Germany Exchange Sale price¥25,800

Vietnam Cobalt Spinel (Color Shift) 0.025ct Loose Stone, Japan-Germany Exchange Sale price¥25,800

非加熱ブラジル産パライバトルマリン 0.044ctルース（CuO:1.6%、MnO:2.0%）

Unheated Brazilian Paraiba Tourmaline 0.044ct loose stone (CuO: 1.6%, MnO: 2.0%) Sale price¥59,800

非加熱ブラジル産パライバトルマリン 0.068ctルース（CuO:1.4%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.068ct loose stone (CuO: 1.4%, MnO: 2.3%) Sale price¥69,800

American red beryl 0.092ct loose Sale price¥19,800

Brazilian Lazurite (Azurite) 0.083ct loose stone Sale price¥24,800

Brazilian Lazurite (Azurite) 0.071ct loose stone Sale price¥22,800

Brazilian Lazurite (Azurite) 0.052ct loose stone Sale price¥16,800

Brazilian alexandrite 0.081ct loose Sale price¥16,800

Paraiba tourmaline from Brazil 0.047ct loose Sale price¥29,800

Brazilian Paraiba Tourmaline 0.068ct loose stone Sale price¥39,800

Paraiba tourmaline from Brazil 0.071ct loose Sale price¥39,800

Paraiba tourmaline from Brazil 0.052ct loose Sale price¥29,800

Paraiba tourmaline from Brazil 0.051ct loose Sale price¥29,800

Paraiba tourmaline from Brazil 0.048ct loose Sale price¥29,800

Pakistani Veirinite 0.072ct loose stone Sale price¥19,800

Russian diamond rough (sawable) 0.094ct rough Sale price¥24,800

Bicolor Euclase from Zimbabwe 0.033ct loose Sale price¥28,800

非加熱ブラジル産パライバトルマリン 0.037ctルース（CuO:1.9%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.037ct loose stone (CuO: 1.9%, MnO: 2.3%) Sale price¥49,800

非加熱ブラジル産パライバトルマリン 0.067ctルース（CuO:1.4%、MnO:2.4%）

Unheated Brazilian Paraiba Tourmaline 0.067ct loose stone (CuO: 1.4%, MnO: 2.4%) Sale price¥59,800

非加熱ブラジル産パライバトルマリン 0.034ctルース（CuO:1.8%、MnO:2.4%）

Unheated Brazilian Paraiba Tourmaline 0.034ct loose stone (CuO: 1.8%, MnO: 2.4%) Sale price¥39,800

Unheated Brazilian Paraiba Tourmaline 0.071ct loose stone (CuO: 2.1%, MnO: 2.2%) Sale price¥59,800

非加熱ブラジル産パライバトルマリン 0.051ctルース（CuO:2.0%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.051ct loose stone (CuO: 2.0%, MnO: 2.3%) Sale price¥55,800

American benitoite 0.074ct loose Sale price¥8,800

非加熱ブラジル産パライバトルマリン 0.079ctルース（CuO:1.8%、MnO:2.6%）

Unheated Brazilian Paraiba Tourmaline 0.079ct loose stone (CuO: 1.8%, MnO: 2.6%) Sale price¥69,800

Brazilian rutilated quartz (rutilated quartz) 8.247ct loose stone Sale price¥14,800

Flower rutilated quartz 0.955ct loose stone Sale price¥9,800

Diamond 2.7mm/0.074ct loose (E, SI2, special cut) Sale price¥18,800

American Benitoite 0.084ct loose stone (colorless Benitoite) Sale price¥12,800

Brazilian Alexandrite 0.069ct loose stone (princess cut) Sale price¥17,800

Brazilian Alexandrite 0.068ct loose stone (princess cut) Sale price¥17,800

Brazilian Alexandrite 0.072ct loose stone (princess cut) Sale price¥18,800

Stibnite in Quartz 7.885ct loose stone Sale price¥12,800

Brazilian Flower Rutile in Quartz 5.122ct Loose Stone Sale price¥9,800

Russian rough diamond (sawable) 0.088ct loose Sale price¥22,800

非加熱ブラジル産パライバトルマリン 0.060ctルース（CuO:1.6%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.060ct loose stone (CuO: 1.6%, MnO: 2.3%) Sale price¥59,800

非加熱ブラジル産パライバトルマリン 0.068ctルース（CuO:1.7%、MnO:2.4%）

Unheated Brazilian Paraiba Tourmaline 0.068ct loose stone (CuO: 1.7%, MnO: 2.4%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.053ct loose stone (CuO: 1.4%, MnO: 3.1%) Sale price¥62,800

KARATZ Custom Made

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.

KARATZ・Five Commitments

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.