Birthstone list
Paraiba tourmaline from Brazil 0.205ct loose (CuO:0.8%, MnO:3.1%)
Sale price¥39,800
Paraiba tourmaline from Brazil 0.167ct loose (CuO:1.6%, MnO:3.0%)
Sale price¥29,800
Paraiba tourmaline from Brazil 0.086ct loose (CuO:1.5%, MnO:2.3%)
Sale price¥18,800
Paraiba tourmaline from Brazil 0.226ct loose (CuO:0.7%, MnO:3.6%)
Sale price¥39,800
Paraiba tourmaline from Brazil 0.204ct loose
Sale price¥29,800
Paraiba tourmaline from Brazil 0.239ct loose
Sale price¥45,800
Paraiba tourmaline from Brazil 0.232ct loose
Sale price¥45,800
Paraiba tourmaline from Brazil 0.240ct loose (CuO:0.7%, MnO:3.8%)
Sale price¥45,800
Brazilian Pink Imperial Topaz 1.907ct Loose Japanese-German Edition
Sale price¥98,000
Colombian mica in emerald 1.314ct loose
Sale price¥39,800
Russian demantoid garnet (horsetail recognized) 4.2mm/0.336ct loose
Sale price¥79,800
Mexican Opal 8mm/1.430ct Loose
Sale price¥25,800
Bicolor tourmaline 1.248ct loose
Sale price¥6,980
Bicolor tourmaline 1.097ct loose
Sale price¥5,980
Australian opal 14.837ct loose
Sale price¥98,000
Trapiche emerald 0.650ct loose (reverse trapiche)
Sale price¥6,980
Pink sapphire 0.934ct loose
Sale price¥15,800
Mexican Fire Opal 1.580ct Loose
Sale price¥25,800
[Sakura In-Cut] Mexican Opal 9mm/1.532ct Loose
Sale price¥45,800
Colombian emerald 0.222ct loose stone
Sale price¥59,800
Russian demantoid garnet (horsetail recognized) 4.4mm/0.394ct loose
Sale price¥69,800
Russian demantoid garnet (horsetail recognized) 4.6mm/0.423ct loose
Sale price¥79,800
Green sapphire 7.545ct loose (spade cut)
Sale price¥59,800
Watermelon tourmaline 44.201ct Ruth Japanese-German book
Sale price¥398,000
Bicolor tourmaline 3.277ct loose
Sale price¥9,800
Particolor tourmaline 32.207ct loose (tricolor tourmaline)
Sale price¥398,000
Cantera opal 17.284ct loose
Sale price¥29,800
Fire opal 1.360ct loose
Sale price¥9,800
Russian demantoid garnet (horsetail recognized) 5.8mm/0.876ct loose
Sale price¥258,000
Pink tourmaline 0.391ct loose
Sale price¥4,980
[Mr. NOBU] Green Opal from Amazon [Collaboration] 6.8mm loose
Sale price¥6,980
[Cat cut] Amazon green opal 6.5mm/0.580ct loose
Sale price¥6,980
Brazilian Indigolite Tourmaline 0.609ct Loose Stone JTL
Sale price¥25,800
Tanzanian Almandine Garnet 2.992ct Loose Stone, Japan-Germany Exchange
Sale price¥15,800
Brazilian Imperial Topaz 0.563ct Loose Stone
Sale price¥15,800
Tanzanian Rhodolite Garnet 0.801ct Loose Stone
Sale price¥9,800
Tanzanian Rhodolite Garnet 0.405ct Loose Stone
Sale price¥6,980
Pt900 Brazilian Swiss Blue Topaz 0.41ct Cat Cut Earrings
Sale price¥19,800
Colombian emerald 0.101ct loose stone
Sale price¥15,800
Blue sapphire 4.0mm/0.314ct loose stone
Sale price¥112,800
Tanzanian Dragon Garnet 0.829ct Loose Stone
Sale price¥22,800
Tanzanian Dragon Garnet 1.019ct Loose Stone
Sale price¥25,800
Tanzanian Dragon Garnet 0.754ct Loose Stone
Sale price¥19,800
Paraiba tourmaline from Mozambique 0.154ct loose stone
Sale price¥19,800
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.