Birthstone list
Brazilian Imperial Topaz 0.826ct Loose
Sale price¥18,800
Mexican Cantera Opal 15.195ct Loose
Sale price¥12,800
YAG (Yttrium Aluminum Garnet) 1.171ct loose stone
Sale price¥14,800
YAG (Yttrium Aluminum Garnet) 1.357ct loose stone
Sale price¥15,800
Mexican Fire Opal 3.425ct Loose
Sale price¥22,800
Mexican Fire Opal 1.743ct Loose
Sale price¥18,800
Mexican Fire Opal 2.235ct Loose
Sale price¥19,800
Green tourmaline 0.457ct loose stone
Sale price¥8,800
Green tourmaline 0.621ct loose stone
Sale price¥9,800
Nepalese Bicolor Kyanite 6.3mm/0.903ct Loose Stone
Sale price¥9,800
Nepalese bicolor kyanite 0.987ct loose stone
Sale price¥9,800
Mexican Fire Opal 1.424ct Loose
Sale price¥39,800
Mexican Fire Opal 1.833ct Loose
Sale price¥39,800
Tanzanite 1.004ct loose stone
Sale price¥18,800
Russian Demantoid Garnet (Horsetail) 2.9mm/0.194ct Loose Stone
Sale price¥22,800
Mozambican Rhodolite Garnet 1.890ct Loose Stone
Sale price¥18,800
3.073ct Mozambique Almandine Garnet Loose Stone
Sale price¥22,800
0.281ct Tanzanian Yellow Sapphire Loose Gemstone
Sale price¥6,980
Untreated green tourmaline from Brazil, 0.596 ct, loose
Sale price¥9,800
Brazilian Rubellite 0.340ct Loose Stone with Appraisal
Sale price¥25,800
Untreated Brazilian green tourmaline, 0.456 ct, loose (teal color)
Sale price¥13,800
Bicolor Grossular Garnet from Kenya (Bicolor Tsavorite) 0.496ct Loose
Sale price¥14,800
Bicolor Grossular Garnet (Bicolor Tsavorite) from Kenya, 0.761 ct, Loose
Sale price¥22,800
Untreated Sri Lankan Star Sapphire 0.961ct Loose Stone
Sale price¥11,800
Unheated Sri Lankan star sapphire 3.9mm/0.499ct loose gemstone
Sale price¥8,800
Colombian emerald with pyrite 0.248ct rough stone
Sale price¥12,800
0.517ct loose blue sapphire from Sri Lanka
Sale price¥18,800
Peruvian Bicolor Blue Opal 4.379 ct Loose Gemstone
Sale price¥6,980
0.345ct Loose Blue Sapphire from Sri Lanka
Sale price¥12,800
0.442ct Loose Blue Sapphire from Sri Lanka
Sale price¥22,800
Tanzanian Rhodolite Garnet 0.609ct Loose Gemstone
Sale price¥8,800
Brazilian Aventurine Aquamarine 4.2mm/0.239ct Loose Stone
Sale price¥8,800
0.455ct Loose Madagascar Blue Sapphire
Sale price¥25,800
0.329ct Loose Blue Sapphire from Sri Lanka
Sale price¥15,800
Loose 0.485 ct Sri Lankan Blue Sapphire
Sale price¥9,800
0.354ct Unheated Star Sapphire Loose Stone from Sri Lanka
Sale price¥6,980
Sri Lankan Unheated Star Sapphire 0.238ct Loose
Sale price¥3,980
[Calafri] K18WG Tsavorite 0.57ct Ring with Certificate
Sale price¥89,800
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.