Birthstone list
Mexican Cantera Opal 3.167ct loose stone (faceted cut)
Sale price¥12,800
Madagascar Green Sapphire 0.435ct Loose
Sale price¥13,800
Mexican fire opal (faceted cut) 0.387ct loose stone
Sale price¥14,800
Synthetic black opal 2.996ct loose stone
Sale price¥29,800
Madagascar Blue Sapphire (Ice Blue) 0.584ct Loose
Sale price¥19,800
Sri Lankan Blue Sapphire 0.251ct Loose
Sale price¥12,800
Montana sapphire 0.370ct loose stone
Sale price¥9,800
[Takeshi Yamamoto] Brazilian Ametrine 24.465ct loose stone
Sale price¥98,000
White Topaz 2.563ct Loose (Needle-in Topaz)
Sale price¥5,980
Pt950 Sri Lankan purple sapphire 0.318ct and blue sapphire earrings
Sale price¥39,800
Brazilian Alexandrite 0.054ct Loose (Emerald Cut)
Sale price¥18,800
Brazilian Paraiba Tourmaline in Quartz 0.712ct Loose Stone
Sale price¥15,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.718ct Loose Stone
Sale price¥18,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.656ct Loose Stone
Sale price¥15,800
Synthetic black opal 1.209ct loose stone
Sale price¥18,800
Tanzanite from Tanzania 4.9mm/0.531ct loose stone
Sale price¥12,800
Montana Sapphire 0.275ct Loose (Blue Sapphire)
Sale price¥8,800
Montana Sapphire 0.217ct Loose (Blue Sapphire)
Sale price¥8,800
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
[12558729] Brazilian Alexandrite 0.079ct loose stone
Sale price¥31,800
Brazilian Alexandrite 0.071ct Loose (Emerald Cut)
Sale price¥29,800
Brazilian Limonite in Topaz 10.100ct Loose Stone
Sale price¥25,800
Myanmar Star Peridot 3.644ct Loose Stone
Sale price¥39,800
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
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
Colombian Trapiche Emerald 1.343ct Loose
Sale price¥69,800
Tanzanite from Tanzania 0.734ct loose stone
Sale price¥12,800
Brazilian bicolor tourmaline 4.291ct loose stone
Sale price¥55,800
Brazilian bicolor tourmaline 6.227ct loose stone
Sale price¥69,800
Illusion Pink Tourmaline (Iridescent Tourmaline) 4.172ct Loose
Sale price¥59,800
Bicolor sapphire 0.180ct loose
Sale price¥12,800
Bicolor sapphire 0.225ct loose
Sale price¥15,800
Bicolor sapphire 0.480ct loose
Sale price¥28,800
Bicolor sapphire 0.405ct loose
Sale price¥25,800
Afghanistan Seafoam Tourmaline 0.429ct Loose Stone
Sale price¥25,800
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.