Birthstone list
Canadian rough diamond (sawable) 0.096ct rough with trigon
Sale price¥29,800
Kazakhstan Golden Hill Turquoise 2.314ct Loose Stone
Sale price¥7,980
Opal 6mm/0.590ct loose (rose cut)
Sale price¥5,980
South African yellow diamond (makeable) 0.159ct rough stone
Sale price¥12,800
Paraiba tourmaline from Brazil 0.117ct loose
Sale price¥39,800
Paraiba tourmaline from Mozambique 1.057ct loose
Sale price¥29,800
Paraiba tourmaline from Brazil 0.062ct loose (CuO:1.4%, MnO:1.5%)
Sale price¥39,800
Paraiba tourmaline from Brazil 0.032ct loose (CuO:2.2%, MnO:1.8%)
Sale price¥25,800
Paraiba tourmaline from Brazil 0.039ct loose (CuO:1.5%, MnO:2.0%)
Sale price¥24,800
Green tourmaline 0.389ct loose
Sale price¥8,800
Paraiba tourmaline from Brazil 0.129ct loose (Cu:0.6%,MnO:0.9%)
Sale price¥29,800
Bicolor star sapphire from Myanmar 0.920ct loose
Sale price¥39,800
Green tourmaline 1.258ct loose
Sale price¥29,800
Russian Demantoid Garnet (Horsetail Inclusions) 4.7mm/0.445ct Loose
Sale price¥69,800
0.296ct Loose Tanzanite from Tanzania
Sale price¥12,800
0.343 ct Tanzanite Loose Gemstone from Tanzania
Sale price¥8,800
Tanzanian Lavender Tanzanite 0.391ct Loose Stone
Sale price¥12,800
Tanzanite 0.579ct loose stone from Tanzania
Sale price¥5,980
Tanzanian Rhodolite Garnet 9.3mm/4.393ct Loose Stone
Sale price¥29,800
Tanzanian Rhodolite Garnet 9.2mm/4.174ct Loose Stone
Sale price¥29,800
Tanzanian Tanzanite 4.3mm/0.311ct Loose Stone
Sale price¥12,800
Tanzanite from Tanzania 0.889ct loose stone
Sale price¥18,800
Mexican Opal (Faceted) 0.208ct Loose Stone
Sale price¥9,800
0.933 ct loose Mozambican rubellite
Sale price¥25,800
0.742ct Bicolor Kyanite Loose Stone from Nepal
Sale price¥18,800
Unheated Pigeon Blood Ruby 5.0mm/0.520ct Loose Stone AIGS
Sale price¥128,000
Green tourmaline 0.388ct loose
Sale price¥8,800
Green tourmaline 2.007ct loose
Sale price¥29,800
Rubellite 0.549ct loose
Sale price¥19,800
Mexican Opal 0.790ct Loose (Contrarus Opal, Faceted Cut)
Sale price¥18,800
Colombian trapiche emerald (reverse trapiche) 0.457ct rough stone
Sale price¥25,800
Mexican Fire Opal 0.564ct Loose (Faceted Cut)
Sale price¥12,800
Mexican Fire Opal 0.472ct Loose (Star Cut, Faceted Cut)
Sale price¥8,800
Mexican Fire Opal 0.277ct Loose (Faceted Cut)
Sale price¥5,980
Tourmaline 0.731ct loose
Sale price¥5,980
0.076ct Loose Madagascar Bekily Blue Garnet (Color Change Garnet)
Sale price¥9,800
Mexican Fire Opal 0.218ct Loose Stone (Faceted Cut)
Sale price¥18,800
Colombian pyrite emerald 8.044ct loose stone
Sale price¥188,000
0.338ct Canadian Green Diamond Rough (Sawable) - With Trigons
Sale price¥128,000
Zambian bicolor tourmaline 4.142ct loose stone
Sale price¥98,000
Australian Iron Opal 17.439ct Loose
Sale price¥18,800
Colombian emerald 8.90ct rough stone
Sale price¥69,800
Colombian pyrite emerald 2.380ct rough stone
Sale price¥39,800
Russian Demantoid Garnet (Horsetail Recognized) 5.1mm/0.664ct Loose Stone
Sale price¥188,000
Diamond rough (makeable) 0.284ct rough
Sale price¥12,800
0.796ct Loose Bicolor Grossular Garnet from Tanzania
Sale price¥39,800
Tanzanian Rhodolite Garnet 0.733ct 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.