Birthstone list
[Rouge cut] Almandine garnet 2.090ct loose
Sale price¥8,800
YAG (Yttrium Aluminum Garnet) 7mm/1.775ct Loose Stone
Sale price¥9,800
Paraiba Tourmaline from Mozambique 2.037ct loose stone with gem analysis
Sale price¥498,000
Australian boulder opal 3.695ct loose
Sale price¥14,800
Australian boulder opal 2.470ct loose
Sale price¥7,980
Pink tourmaline 0.516ct loose
Sale price¥5,980
Sri Lankan star sapphire 2.094ct loose
Sale price¥12,800
Sri Lankan star sapphire 1.487ct loose
Sale price¥8,800
Bicolor tanzanite 0.479ct loose
Sale price¥18,800
Colombian pyrite in emerald 4.592ct loose
Sale price¥110,000
Green sapphire 0.518ct loose (teal green)
Sale price¥8,800
Unheated silky pink sapphire from Vietnam 0.426ct loose
Sale price¥9,800
Montana Sapphire 3mm/0.155ct loose
Sale price¥18,800
Paraiba tourmaline from Brazil 0.144ct loose (CuO:0.9%,MnO:2.8%)
Sale price¥55,800
Greenland Ruby 0.253ct Loose Stone with Certificate
Sale price¥49,800
Greenland Ruby 0.266ct Loose Stone with Certificate
Sale price¥22,800
Greenland sapphire 0.133ct loose stone with certificate
Sale price¥14,800
Tanzanian Almandine Garnet 0.930ct Loose Stone
Sale price¥9,800
Tanzanian Almandine Garnet 0.750ct Loose Stone
Sale price¥9,800
Tanzanian Almandine Garnet 0.885ct Loose Stone
Sale price¥8,800
Brazilian bicolor tourmaline 4.497ct loose stone
Sale price¥69,800
Brazilian Green Tourmaline 5.0mm/0.401ct Loose Stone (Rose Cut)
Sale price¥9,800
Russian Demantoid Garnet (Horsetail) 3.8mm/0.249ct Loose Stone
Sale price¥39,800
Sapphire from Madagascar 4.3mm/0.398ct loose
Sale price¥12,800
Brazilian rose amethyst 0.793ct loose stone
Sale price¥15,800
Brazilian bicolor tourmaline 2.047ct loose
Sale price¥29,800
Diamond 0.061ct loose (trapeze cut, VS class equivalent)
Sale price¥7,980
Diamond 0.042ct loose (trapeze cut, VS class equivalent)
Sale price¥6,980
Diamond 0.039ct loose (trapeze cut, equivalent to VS class)
Sale price¥5,980
Madeira Citrine 7mm/0.938ct loose
Sale price¥3,980
Bicolor tourmaline 22.088ct loose
Sale price¥298,000
Mexican Fire Opal 4.2mm/0.182ct Loose
Sale price¥8,800
Blue tourmaline from Afghanistan 4.5mm/0.326ct loose
Sale price¥7,980
Silky pink sapphire from Madagascar, 1.050ct loose, GIT
Sale price¥128,000
Mozambique Ruby 3.4mm/0.139ct Loose Stone
Sale price¥25,800
Yellow sapphire from Madagascar 0.207ct loose
Sale price¥6,980
Madagascar sapphire 0.205ct loose
Sale price¥7,980
0.200ct loose diamond (G, VVS2, radiant cut)
Sale price¥29,800
3.2mm/0.132ct loose diamond (G, VS-2, Excellent)
Sale price¥29,800
Tanzanian Almandine Garnet 11.0mm/6.787ct Loose Stone
Sale price¥49,800
Tanzanian Almandine Garnet 10mm/6.196ct Loose Stone
Sale price¥29,800
Mozambique Rhodolite Garnet 3.662ct Loose Stone
Sale price¥25,800
Tanzanian Almandine Garnet 6.5mm/1.071ct Loose Stone
Sale price¥11,000
Tanzanian Almandine Garnet 2.897ct Loose Stone
Sale price¥22,800
Tanzanian Almandine Garnet 2.169 ct Loose Stone
Sale price¥21,800
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.