Birthstone list
Blue tourmaline from Afghanistan 4.5mm/0.326ct loose
Sale price¥7,980
Mexican Fire Opal 4.2mm/0.182ct Loose
Sale price¥8,800
Bicolor tourmaline 22.088ct loose
Sale price¥298,000
Madeira Citrine 7mm/0.938ct loose
Sale price¥3,980
Diamond 0.039ct loose (trapeze cut, equivalent to VS class)
Sale price¥5,980
Diamond 0.042ct loose (trapeze cut, VS class equivalent)
Sale price¥6,980
Diamond 0.061ct loose (trapeze cut, VS class equivalent)
Sale price¥7,980
Brazilian bicolor tourmaline 2.047ct loose
Sale price¥29,800
Brazilian rose amethyst 0.793ct loose stone
Sale price¥15,800
Sapphire from Madagascar 4.3mm/0.398ct loose
Sale price¥12,800
Russian Demantoid Garnet (Horsetail) 3.8mm/0.249ct Loose Stone
Sale price¥39,800
Brazilian Green Tourmaline 5.0mm/0.401ct Loose Stone (Rose Cut)
Sale price¥9,800
Brazilian bicolor tourmaline 4.497ct loose stone
Sale price¥69,800
Tanzanian Almandine Garnet 0.885ct Loose Stone
Sale price¥8,800
Tanzanian Almandine Garnet 0.750ct Loose Stone
Sale price¥9,800
Greenland sapphire 0.133ct loose stone with certificate
Sale price¥14,800
Greenland Ruby 0.266ct Loose Stone with Certificate
Sale price¥22,800
Greenland Ruby 0.253ct Loose Stone with Certificate
Sale price¥49,800
Montana Sapphire 3mm/0.155ct loose
Sale price¥18,800
Unheated silky pink sapphire from Vietnam 0.426ct loose
Sale price¥9,800
Colombian pyrite in emerald 4.592ct loose
Sale price¥110,000
Sri Lankan star sapphire 1.487ct loose
Sale price¥8,800
Montana sapphire 0.370ct loose stone
Sale price¥9,800
Montana Sapphire 0.331ct Loose (Bi-Color Sapphire)
Sale price¥8,800
Brazilian Pink Tourmaline 0.960ct Loose Stone
Sale price¥15,800
Brazilian Imperial Topaz 0.398ct Loose Stone
Sale price¥12,800
Tanzanite 41.690ct loose
Sale price¥2,480,000
White sapphire 0.338ct loose
Sale price¥9,800
Bicolor sapphire 0.856ct loose
Sale price¥18,800
Silky diamond 2.7mm/0.086ct loose
Sale price¥14,800
#202510 Campaign Shortage Bicolor Tourmaline 3.468ct Loose
Sale price¥6,980
Ice blue sapphire 3.813ct loose
Sale price¥49,800
Sri Lankan star sapphire 2.094ct loose
Sale price¥12,800
Pink tourmaline 0.516ct loose
Sale price¥5,980
Australian boulder opal 2.470ct loose
Sale price¥7,980
Australian boulder opal 3.695ct loose
Sale price¥14,800
YAG (Yttrium Aluminum Garnet) 7mm/1.775ct Loose Stone
Sale price¥9,800
[Rouge cut] Almandine garnet 2.090ct loose
Sale price¥8,800
Colombian emerald rough stone 7.924ct
Sale price¥9,800
Synthetic sapphire 0.879ct loose stone (synthetic blue sapphire)
Sale price¥14,800
1.547ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)
Sale price¥9,800
Sri Lankan Yellow Sapphire 0.297ct Loose
Sale price¥12,800
Sri Lankan Golden Sapphire 0.649ct Loose
Sale price¥29,800
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.