Birthstone list
Bicolor Zoisite 1.100ct Loose Stone (Bicolor Tanzanite)
Sale price¥18,800
Lavender Tanzanite 0.784ct loose stone
Sale price¥12,800
Mexican Opal 0.499ct Loose
Sale price¥3,980
Sky blue topaz 1.051ct loose stone
Sale price¥8,800
Bicolor tourmaline 1.329ct loose
Sale price¥9,800
Bicolor tourmaline 0.429ct loose
Sale price¥5,980
Bicolor Tourmaline 0.378ct Loose Stone (Hexagonal Cut)
Sale price¥8,800
Pink tourmaline 0.819ct loose
Sale price¥9,800
Pink tourmaline 0.539ct loose stone (heart shape)
Sale price¥9,800
[Colorfri] K18 Akoya Pearl and 0.08ct Diamond Ring with Certificate
Sale price¥49,800
【COLORFLE】Pt900/K18 Diamond 0.22ct Ring with Certificate
Sale price¥98,000
0.210ct Colombian Non-Oil Emerald Loose Stone GIA
Sale price¥228,000
Colombian Trapiche Emerald, 1.874ct Loose Stone with Certification
Sale price¥69,800
Unheated Blue Sapphire 2.430ct Loose GIA
Sale price¥258,000
Pyrite in emerald from Chivor Mine, Colombia, 4.221 ct, loose
Sale price¥98,000
Nepalese Kyanite 2.906ct Loose Stone with Certification
Sale price¥19,800
Malawi Moonstone 2.428ct Loose
Sale price¥18,800
Malawi Moonstone (Malawi Moonstone) 2.233ct Loose
Sale price¥15,800
Malawi Moonstone (Malawi Moonstone) 2.209ct Loose Stone
Sale price¥15,800
Malawi Moonstone 2.201ct Loose
Sale price¥15,800
Malawi Moonstone 2.144ct Loose Gemstone
Sale price¥15,800
Malawi Moonstone 2.055ct Loose
Sale price¥16,800
Loose 1.661 ct Malawi Moonstone
Sale price¥12,800
0.048ct Loose Purple Diamond (FANCY VIVID PINK PURPLE, SI-1) CGL
Sale price¥198,000
Internally Flawless Diamond 4.4mm/0.320ct Loose (G, IF, 3Excellent) GIA
Sale price¥89,800
Malawi Moonstone 2.601ct Loose
Sale price¥5,980
Ruby 0.820ct Loose Gem (Hohki-kyo)
Sale price¥39,800
Loose 0.239ct Paraiba Tourmaline from Brazil (CuO: 0.8%, MnO: 3.7%)
Sale price¥45,800
Paraiba Tourmaline from Brazil 0.265ct Loose (CuO: 0.7%, MnO: 3.0%)
Sale price¥29,800
Brazilian Paraiba Tourmaline 0.205ct Loose Stone (CuO: 0.8%, MnO: 3.1%)
Sale price¥39,800
Brazilian Paraiba Tourmaline 0.211ct Loose (CuO:0.6%, MnO:3.1%)
Sale price¥39,800
Blue watermelon tourmaline 6.815ct loose
Sale price¥49,800
Amethyst 4.249ct rough stone
Sale price¥4,980
Brazilian Paraiba Tourmaline 0.065ct Loose Stone (CuO: 2.0%, MnO: 2.4%)
Sale price¥49,800
0.066ct loose Brazilian Paraiba Tourmaline (CuO: 1.5%, MnO: 2.2%)
Sale price¥45,800
Paraiba Tourmaline from Brazil, 0.063 ct, loose (CuO: 1.8%, MnO: 2.4%)
Sale price¥55,800
Loose 0.061ct Brazilian Paraiba Tourmaline (CuO: 1.7%, MnO: 2.2%)
Sale price¥49,800
0.062ct Loose Paraiba Tourmaline from Brazil (CuO: 1.7%, MnO: 2.5%)
Sale price¥47,800
Pink tourmaline 0.845ct 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.