Birthstone list
Sri Lankan pink star sapphire 1.021ct loose stone
Sale price¥11,000
Brazilian bicolor tourmaline 1.660ct loose stone
Sale price¥29,800
Tanzanian bicolor tanzanite 1.644ct rough and loose stone set of 2
Sale price¥8,800
[Dandelion cut] Pyrope almandine garnet 9.0mm/3.566ct loose stone
Sale price¥35,800
[Dandelion Cut] Brazilian Pink Tourmaline 7mm Loose Patch
Sale price¥55,800
Caribbean Conch Pearl 0.332ct Loose (Pink White)
Sale price¥29,800
Mexican Opal 8.8mm/1.640ct Loose
Sale price¥29,800
Sri Lankan bicolor sapphire 0.260ct loose stone
Sale price¥12,800
Bicolor sapphire 2.040ct loose stone
Sale price¥59,800
Brazilian bicolor tourmaline 1.020ct loose stone
Sale price¥19,800
Brazilian bicolor tourmaline 0.540ct loose stone
Sale price¥5,980
Brazilian bicolor tourmaline 1.020ct loose stone
Sale price¥15,800
Mexican Opal 4.5mm/0.220ct Loose
Sale price¥5,980
Mexican Fire Opal 8.0mm/1.270ct Loose
Sale price¥29,800
[Sakura Shape] Mexican Opal 2.551ct Loose Patch
Sale price¥59,800
[Rouge cut] Almandine garnet 2.476ct loose stone
Sale price¥9,800
[Takeshi Yamamoto] Ametrine 20.856ct loose stone
Sale price¥98,000
Synthetic Opal (Synthetic Black Opal) 0.723ct Loose
Sale price¥15,800
Synthetic Opal (Synthetic Black Opal) 0.651ct Loose
Sale price¥15,800
Mexican Fire Opal (Faceted) 1.961ct Loose
Sale price¥29,800
Mexican Fire Opal 1.755ct Loose
Sale price¥29,800
Mexican Fire Opal 1.341ct Loose
Sale price¥39,800
Sri Lankan Yellow Sapphire 0.253ct Loose
Sale price¥8,800
Sri Lankan Yellow Sapphire 0.226ct Loose
Sale price¥8,800
Sri Lankan Yellow Sapphire 0.272ct Loose (Bicolor)
Sale price¥12,800
Sri Lankan Yellow Sapphire 0.543ct Loose
Sale price¥29,800
Indian Moonstone 6.2mm/0.749ct Loose
Sale price¥7,980
Indian Moonstone 8.2mm/1.823ct Loose
Sale price¥14,800
Unheated Mozambique Ruby 0.220ct Loose
Sale price¥25,800
Colombian emerald 3.5mm/0.150ct loose stone
Sale price¥22,800
Brazilian Pink Tourmaline 0.960ct Loose Stone
Sale price¥15,800
Brazilian bicolor tourmaline 0.763ct loose stone
Sale price¥7,980
Brazilian bicolor tourmaline 1.177ct loose stone
Sale price¥12,800
Colombian Trapiche Emerald 1.341ct Loose
Sale price¥6,980
Paraiba tourmaline from Brazil 0.112ct loose
Sale price¥29,800
Brazilian Paraiba Tourmaline 0.181ct loose stone (CuO: 0.7%, MnO: 0.2%)
Sale price¥59,800
Tanzanian bicolor tanzanite 3.018ct rough and loose stone set of 2
Sale price¥6,980
Montana Sapphire 3.3mm/0.158ct Loose (Green Sapphire)
Sale price¥15,800
Non-Oil Emerald 1.070ct Loose Gübelin Certificate
Sale price¥698,000
Brazilian bicolor tourmaline 0.914ct loose stone
Sale price¥12,800
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.