Birthstone list
Brazilian unheated pink imperial topaz (sherry pink) 0.284ct loose stone
Sale price¥15,800
Brazilian unheated pink imperial topaz (sherry pink) 0.586ct loose stone
Sale price¥15,800
Brazilian unheated pink imperial topaz (sherry pink) 0.423ct loose stone
Sale price¥15,800
Synthetic black opal 1.209ct loose stone
Sale price¥18,800
Madagascar Purple Sapphire 0.315ct Loose
Sale price¥12,800
Tanzanite from Tanzania 4.9mm/0.531ct loose stone
Sale price¥12,800
Tanzanite from Tanzania 4.7mm/0.503ct loose stone
Sale price¥14,800
Ethiopian Opal 6.0mm/0.584ct Loose
Sale price¥12,800
Brazilian copper rutilated quartz 1.445ct loose stone
Sale price¥8,800
Brazilian copper rutilated quartz 2.051ct loose stone
Sale price¥8,800
Sri Lankan pink star sapphire 0.391ct loose stone
Sale price¥12,800
Sri Lankan pink star sapphire 0.270ct loose stone
Sale price¥12,800
0.095ct Brazilian Alexandrite Loose Stone (Emerald Cut)
Sale price¥35,800
Brazilian Alexandrite 0.071ct loose stone (emerald cut)
Sale price¥29,800
Brazilian Alexandrite 0.066ct loose stone (emerald cut)
Sale price¥22,800
Tanzanite from Tanzania 1.384ct loose stone
Sale price¥35,800
Myanmar Star Peridot 2.678ct Loose Stone
Sale price¥29,800
Diamond 0.215ct loose (rose cut)
Sale price¥15,800
Brazilian Limonite in Topaz 10.100ct Loose Stone
Sale price¥25,800
Myanmar Star Peridot 3.644ct Loose Stone
Sale price¥39,800
Russian Demantoid Garnet (Horsetail certified) 3.6mm/0.293ct loose stone
Sale price¥49,800
Star sapphire 7.256ct loose stone
Sale price¥18,800
Star Ruby 0.461ct Loose Stone with Certificate
Sale price¥18,800
Sri Lankan Star Ruby 0.564ct Loose Stone with Certificate
Sale price¥24,800
Brazilian citrine 2.641ct loose stone
Sale price¥8,800
Colombian pyrite emerald 27.414ct loose stone
Sale price¥298,000
[Sakura Shape] Mexican Opal 8.2mm/1.465ct {Collaboration} Loose Patch
Sale price¥45,800
Brazilian Ametrine 11.843ct loose stone
Sale price¥22,800
Yellow Diamond 4.7mm/0.390ct Loose (LIGHT YELLOW, VVS1, 3Excellent H&C)
Sale price¥49,800
K18PG Brazilian color shift amethyst, hackmanite, pink sapphire ring
Sale price¥79,800
Myanmar Leuco Garnet 0.504ct Loose Stone JTL Catalog
Sale price¥39,800
Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.189ct Loose Stone
Sale price¥16,800
Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.192ct Loose Stone
Sale price¥13,800
Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.272ct Loose Stone
Sale price¥19,800
Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.272ct Loose Stone
Sale price¥19,800
Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.179ct Loose Stone
Sale price¥12,800
Parasite Peridot (Parasitetic Peridot) 0.172ct Loose Stone
Sale price¥98,000
Colombian Trapiche Emerald 1.343ct Loose
Sale price¥69,800
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.