Birthstone list
Russian Demantoid Garnet (Horsetail Recognized) 5.2mm/0.661ct Loose Stone
Sale price¥198,000
Brazilian Swiss Blue Topaz 17.410ct Loose
Sale price¥27,800
Brazilian Swiss Blue Topaz 11.536ct Loose
Sale price¥14,800
Brazilian Swiss Blue Topaz 10.958ct Loose
Sale price¥14,800
Russian Demantoid Garnet 2.5mm/0.111ct Loose Stone
Sale price¥18,800
Nepalese Kyanite 0.793ct loose stone
Sale price¥6,980
Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.170ct Loose
Sale price¥17,800
Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.160ct Loose
Sale price¥16,800
Afghanistan Bicolor Tourmaline 0.672ct Loose Stone
Sale price¥9,800
Afghanistan Bicolor Tourmaline 0.471ct Loose Stone
Sale price¥9,800
Afghanistan Bicolor Tourmaline 0.673ct Loose Stone
Sale price¥15,800
Brazilian Indigolite Tourmaline in Quartz 1.626ct Loose Stone
Sale price¥12,800
Brazilian Indigolite Tourmaline in Quartz 2.036ct Loose Stone
Sale price¥12,800
Sri Lankan Star Sapphire 0.753ct Loose
Sale price¥8,800
Sri Lankan Star Sapphire 0.681ct Loose
Sale price¥8,800
Sri Lankan Star Sapphire 5.0mm/0.897ct Loose Stone
Sale price¥8,800
Sri Lankan Star Sapphire 0.796ct Loose
Sale price¥9,800
Tanzanite from Tanzania 7.0mm/1.427ct loose stone
Sale price¥55,800
Sri Lankan Blue Sapphire 4.0mm/0.329ct Loose Stone
Sale price¥22,800
Kenyan Tsavorite 3.9mm/0.257ct Loose Stone
Sale price¥8,800
Ruby 4.0mm/0.305ct loose stone
Sale price¥45,800
[Colorful] K18WG Brown Diamond Ring
Sale price¥69,800
South African diamond rough (sawable) 0.096ct rough (with trigon)
Sale price¥39,800
Diamond (cabochon cut) 0.247ct loose (VS-SI class equivalent)
Sale price¥39,800
Zambian emerald 0.181ct loose stone
Sale price¥8,800
Mexican Cantera Opal 5.126ct Loose
Sale price¥25,800
Mexican Cantera Opal 7.081ct Loose
Sale price¥15,800
Mexican Cantera Opal 4.602ct Loose
Sale price¥29,800
Mexican Cantera Opal 6.385ct Loose
Sale price¥18,800
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
Australian black opal 0.856ct loose stone
Sale price¥12,800
Australian black opal 1.018ct loose stone
Sale price¥18,800
Australian black opal 0.812ct loose stone
Sale price¥8,800
Pakistani Ludwigite in Peridot 0.285ct loose stone
Sale price¥5,980
Brazilian indigolite tourmaline 1.060ct loose stone
Sale price¥19,800
Madagascar sapphire 0.375ct loose stone
Sale price¥8,800
Pink tourmaline 0.333ct loose stone
Sale price¥9,800
Brazilian copper rutilated quartz 0.862ct loose stone
Sale price¥7,980
Sri Lankan sapphire 0.211ct loose stone
Sale price¥8,800
Zambian Emerald 0.182ct Loose Stone (Silky Emerald)
Sale price¥9,800
Zambian emerald 0.099ct loose stone
Sale price¥9,800
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.