Birthstone list
Brazilian Paraiba Tourmaline 0.167ct loose stone (CuO: 1.1%, MnO: 3.6%)
Sale price¥69,800
Brazilian bicolor tourmaline 3.282ct loose
Sale price¥59,800
Brazilian Bicolor Tourmaline 16.088ct Loose (Tricolor) Nikkei
Sale price¥298,000
Russian oil-free emerald 0.640ct loose GIA
Sale price¥198,000
Colombian emerald 3.1mm/0.097ct loose
Sale price¥22,800
Mexican Cantera Opal 5.647ct Loose
Sale price¥19,800
Mexican Cantera Opal 2.809ct Loose
Sale price¥25,800
Mexican Cantera Opal 3.280ct Loose
Sale price¥9,800
Mexican Cantera Opal 4.973ct Loose
Sale price¥15,800
Mexican Cantera Opal 7.460ct Loose
Sale price¥29,800
Pakistani emerald 0.436ct loose stone
Sale price¥49,800
Mexican Cantera Opal 2.982ct Loose
Sale price¥14,800
Mexican Cantera Opal 1.534ct Loose
Sale price¥8,800
Mexican Cantera Opal 11.105ct Loose
Sale price¥12,800
Tanzanite from Tanzania 1.522ct loose stone
Sale price¥55,800
Tanzanite from Tanzania 0.804ct loose stone
Sale price¥24,800
Tanzanite from Tanzania 0.856ct loose stone
Sale price¥29,800
Bicolor tourmaline 0.840ct loose
Sale price¥22,800
Sri Lankan Blue Sapphire 3.8mm/0.279ct Loose
Sale price¥8,800
Sri Lankan Blue Sapphire 4.5mm/0.401ct Loose
Sale price¥12,800
Mexican Fire Opal 0.780ct Loose
Sale price¥12,800
Dominican Republic Conch Pearl 1.60ct Loose
Sale price¥39,800
[Clover in cut] Mexican opal 7mm/0,648ct {Collaboration} Loose patch
Sale price¥45,800
Russian demantoid garnet (horsetail recognized) 3mm/0.188ct loose
Sale price¥19,800
Australian Shell Opal (Shell Opal) 51.801ct Rough Stone
Sale price¥25,800
Brazilian bicolor tourmaline cat's eye 22.056ct loose stone
Sale price¥198,000
Congo Bicolor Tourmaline 3.429ct Loose
Sale price¥128,000
Mozambique Rubellite 1.706ct Loose Stone
Sale price¥39,800
Madagascar emerald 0.816ct loose stone
Sale price¥98,000
Andesine Labradorite (also known as Blue Moonstone) 1.096ct loose stone
Sale price¥45,800
Andesine Labradorite (also known as Blue Moonstone) 0.949ct loose stone
Sale price¥45,800
Kenyan Gold Sheen Sapphire 4mm/0.438ct Loose
Sale price¥55,800
Diamond (cabochon cut) 0.183ct loose
Sale price¥24,800
Diamond (cabochon cut) 0.366ct loose
Sale price¥59,800
Tanzanian Rhodolite Garnet 10.608ct Loose Stone
Sale price¥98,000
Mozambique Aquamarine 3.301ct Loose Stone
Sale price¥59,800
Brazilian Paraiba Tourmaline in Quartz 2.827ct loose stone
Sale price¥49,800
Brazilian Paraiba Tourmaline in Quartz 3.049ct loose stone
Sale price¥49,800
Brazilian Paraiba Tourmaline in Quartz 4.5mm/0.284ct Loose Stone
Sale price¥22,800
Brazilian Paraiba Tourmaline in Quartz 1.146ct Loose Stone
Sale price¥29,800
Brazilian Paraiba Tourmaline in Quartz 8.0mm/1.287ct Loose Stone
Sale price¥29,800
Brazilian Paraiba Tourmaline in Quartz 7.9mm/1.314ct Loose Stone
Sale price¥29,800
Brazilian Limonite in Topaz 3.399ct loose stone
Sale price¥8,800
Colombian Trapiche Emerald 0.629ct Loose
Sale price¥34,800
Kenyan Gold Sheen Sapphire 3.6mm/0.302ct Loose Stone
Sale price¥35,800
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.