Birthstone list
Bicolor Grossular Garnet from Tanzania 0.839ct Loose
Sale price¥19,800
Tanzanian Bicolor Grossular Garnet 0.934ct Loose
Sale price¥24,800
Bicolor Grossular Garnet from Tanzania 0.779ct Loose Stone
Sale price¥19,800
Bicolor Grossular Garnet from Tanzania 0.602ct Loose Stone
Sale price¥16,800
Tanzanian Bicolor Grossular Garnet 0.787ct Loose Stone
Sale price¥19,800
Tanzanian Bi-Color Grossular Garnet 0.882ct Loose Stone
Sale price¥22,800
Tanzanian Bicolor Grossular Garnet 0.544ct Loose Gemstone
Sale price¥14,800
Bicolor Grossular Garnet from Tanzania 0.855ct Loose Stone
Sale price¥18,800
Tanzanian Bicolor Grossular Garnet 0.586ct Loose Stone
Sale price¥14,800
Brazilian Paraiba Tourmaline 2.9mm/0.090ct Loose (CuO:1.7% MnO:1.4%)
Sale price¥69,800
Paraiba tourmaline from Brazil 0.086ct loose
Sale price¥79,800
0.416ct Loose Mozambique Ruby with Gemstone Identification Report
Sale price¥29,800
Brazilian Blue Tourmaline in Quartz 10.466ct Loose
Sale price¥39,800
Brazilian Blue Tourmaline in Quartz 4.241ct Loose
Sale price¥19,800
Sri Lankan orange sapphire 0.654ct loose with certificate
Sale price¥29,800
Sri Lankan Yellow Sapphire 0.815ct Loose Stone with Appraisal
Sale price¥15,800
0.147ct Loose Colombian Emerald with Gemological Report
Sale price¥12,800
Colombian Emerald 3.3mm/0.167ct Loose Stone with Appraisal
Sale price¥24,800
Columbia Emerald 3.3mm/0.158ct Loose Gemstone with Certificate
Sale price¥18,800
Malawi Moonstone 2.114 ct Loose Gemstone
Sale price¥12,800
Malawi Moonstone 1.748ct Loose Gemstone
Sale price¥9,800
Malawi Moonstone 2.001ct Loose
Sale price¥12,800
Malawi Moonstone 1.626ct Loose
Sale price¥9,800
Malawi Moonstone 1.621ct Loose
Sale price¥9,800
Moonstone from Malawi (Malawi Moonstone) 1.684ct Loose
Sale price¥9,800
1.939 ct loose Malawi moonstone
Sale price¥12,800
[On sale August 3rd at 10 PM] Malawi Moonstone 2.183ct Loose Stone
Sale price¥12,800
[Listed on 22602645] [Colorful] Pt900 Ruby 0.6ct Ring
Sale price¥98,000
[Posted on 22602644] [Calafri] K18 Synthetic Sapphire Ring
Sale price¥45,800
[Listed as 22602642][Colorful] Pt950 Moonstone Cat's Eye 3ct Ring
Sale price¥79,800
[Item ID: 22602630] [Karafuri] Pt900 Blue Sapphire 0.43ct Ring
Sale price¥98,000
Diamond loose/certificate transfer fee
Sale price¥8,800
Tanzanian Lavender Tanzanite 0.558ct Loose Stone
Sale price¥12,800
Tanzanian bicolor tanzanite 0.573ct loose stone
Sale price¥12,800
Tanzanian Lavender Tanzanite 0.577ct Loose Stone
Sale price¥12,800
Brazilian Pink Tourmaline 0.418ct Loose Stone (Rouge Cut)
Sale price¥8,800
Russian rough diamond (sawable) 0.088ct loose
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.