Birthstone list
Tanzanian purple sapphire 0.355ct loose stone
Sale price¥9,800
Australian Opal 0.374ct Loose
Sale price¥6,980
Mexican Cantera Opal 1.120ct Loose
Sale price¥8,800
Brazilian pink tourmaline 0.385ct loose stone
Sale price¥7,980
[Rouge Cut] Brazilian Bicolor Tourmaline 0.578ct Loose
Sale price¥9,800
Rouge Cut Almandine Garnet from Mozambique, 5.952ct Loose
Sale price¥15,800
Rouge Cut Almandine Garnet from Mozambique, 5.841ct Loose
Sale price¥14,800
Brazilian Rubellite 4.078ct Loose Stone
Sale price¥98,000
Mozambique Almandine Garnet 2.959ct Loose Stone
Sale price¥19,800
Mozambique Almandine Garnet 1.652ct Loose Stone
Sale price¥15,800
Mozambique Almandine Garnet 7.7mm/1.781ct Loose Stone
Sale price¥18,800
Tanzanian Spessartine Garnet 0.209ct Loose Stone
Sale price¥4,980
Vietnamese aquamarine 1.728ct loose stone
Sale price¥18,800
Tanzanian Dragon Garnet 0.710ct Loose Stone
Sale price¥19,800
Australian boulder opal 1.868ct loose
Sale price¥18,800
Australian boulder opal 1.675ct loose
Sale price¥14,800
Australian boulder opal 28.880ct loose
Sale price¥59,800
Sri Lankan white sapphire 2.9mm/0.086ct loose (rose cut)
Sale price¥3,980
Color change garnet from Madagascar 0.648ct loose
Sale price¥8,800
Brazilian particolor Paraiba tourmaline 0.26ct loose GIA
Sale price¥598,000
YAG (yttrium aluminum garnet) 1.792ct loose
Sale price¥12,800
YAG (Yttrium Aluminum Garnet) 6.5mm/1.774ct loose stone
Sale price¥12,800
Brazilian Paraiba tourmaline 0.226ct loose (CuO:0.7%, MnO:2.5%)
Sale price¥39,800
Bicolor pink star sapphire from Mogok 0.360ct loose
Sale price¥24,800
Pt950 Benitoite 0.10ct Aquamarine Blue Diamond Ring
Sale price¥89,800
Bicolor tourmaline 0.591ct loose (rose cut)
Sale price¥8,980
Bicolor tourmaline 0.435ct loose (rose cut)
Sale price¥5,980
Pink tourmaline 0.482ct loose stone
Sale price¥5,980
Brazilian bicolor tourmaline 0.258ct loose stone
Sale price¥8,800
[12549429] Blue sapphire 0.862ct loose stone
Sale price¥25,800
Colombian Trapiche Emerald 1.448ct Loose
Sale price¥69,800
South African rough diamond (sawable) 0.105ct rough (with trigon)
Sale price¥39,800
Tanzanian Bicolor Grossular Garnet 1.359ct Loose Stone
Sale price¥49,800
Australian boulder opal 9.120ct loose
Sale price¥98,000
Mozambique rubellite 1.406ct loose stone
Sale price¥69,800
Brazilian Swiss Blue Topaz 1.065ct Loose Stone
Sale price¥11,000
Indian moonstone 2.415ct loose stone
Sale price¥15,800
American Anthill Garnet 0.822ct Loose Stone
Sale price¥19,800
Bicolor star sapphire from Myanmar 1.190ct loose (pink sapphire)
Sale price¥25,800
Sierra Leone sapphire 1.210ct loose
Sale price¥7,980
Sierra Leone sapphire 1.470ct loose
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.