Brazilian bicolor topaz (untreated) 1.452ct loose stone
Sale price¥18,800
Brazilian parti-color tourmaline 1.412ct loose stone
Sale price¥39,800
Bicolor tourmaline 1.833ct loose
Sale price¥18,800
Brazilian bicolor tourmaline 0.644ct loose stone
Sale price¥9,800
Brazilian Bicolor Paraiba Tourmaline 0.896ct Loose Stone
Sale price¥18,800
Brazilian Bicolor Paraiba Tourmaline 0.851ct Loose Stone
Sale price¥18,800
Brazilian bicolor tourmaline 1.953ct loose stone
Sale price¥18,800
[Takeshi Yamamoto] Bicolor fluorite 15.624ct loose stone
Sale price¥45,800
[Takeshi Yamamoto] Ametrine 20.856ct loose stone
Sale price¥98,000
Synthetic Opal (Synthetic Black Opal) 0.723ct Loose
Sale price¥15,800
Brazilian bicolor tourmaline 0.914ct loose stone
Sale price¥12,800
Tanzania Bicolor Zoisite 0.320ct Loose Stone
Sale price¥7,980
Brazilian bicolor tourmaline 0.675ct loose stone
Sale price¥9,800
Brazilian bicolor tourmaline 0.820ct loose stone
Sale price¥25,800
Colombian emerald 3.1mm/0.097ct loose
Sale price¥22,800
Bicolor tourmaline 0.840ct loose
Sale price¥22,800
Brazilian bicolor tourmaline cat's eye 22.056ct loose stone
Sale price¥198,000
Congo Bicolor Tourmaline 3.429ct Loose
Sale price¥128,000
Brazilian Limonite in Topaz 3.399ct loose stone
Sale price¥8,800
Ethiopian Opal 1.433ct Loose
Sale price¥3,980
Brazilian bicolor tourmaline 0.326ct loose stone
Sale price¥8,800
Brazilian Limonite in Topaz 6.829ct loose stone
Sale price¥17,800
Brazilian Limonite in Topaz 5.709ct loose stone
Sale price¥9,800
Brazilian Pompon Quartz (Radiated Crystal in Quartz) 7.686ct Loose
Sale price¥15,800
Bicolor Benitoite 0.601ct Loose Japanese-German Edition
Sale price¥458,000
Brazilian parti-color tourmaline 2.702ct loose stone
Sale price¥69,800
Chinese bicolor fluorite 6.274ct loose stone
Sale price¥8,800
Argentine bicolor fluorite 11.226ct loose stone
Sale price¥6,980
Bicolor Tourmaline 13.489ct Loose
Sale price¥9,800
Bicolor tourmaline 9.199ct loose stone
Sale price¥9,800
Bicolor tourmaline 3.468ct loose stone
Sale price¥6,980
Bicolor tourmaline 7.532ct loose stone
Sale price¥9,800
Bicolor tourmaline 7.809ct loose stone
Sale price¥9,800
Tanzania Bicolor Zoisite 1.509ct Loose Stone
Sale price¥22,800
Tanzania Zoisite 1.000ct Loose Stone
Sale price¥19,800
Tanzania Bicolor Zoisite 0.645ct Loose Stone
Sale price¥12,800
Brazilian bicolor tourmaline 0.502ct loose stone
Sale price¥12,800
Brazilian Sky Blue Topaz (untreated) 2.116ct loose stone
Sale price¥15,800
Cassiterite 1.658ct loose stone (bicolor cassiterite) Japan-Germany exchange
Sale price¥128,000
Chinese bicolor fluorite 1.215ct loose stone
Sale price¥7,980
Bicolor Fluorite 6.1mm/0.869ct Loose Stone
Sale price¥6,980
Brazilian bicolor tourmaline 6.928ct loose stone (bicolor blue tourmaline)
Sale price¥298,000
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.