Birthstone list
[On Sale May 3, 10 PM JST] Australian Black Opal 0.385ct Loose Gemstone
Sale price¥18,800
Australian Black Opal 0.362ct Loose
Sale price¥18,800
Australian Black Opal 1.705ct Loose
Sale price¥12,800
[On sale May 3rd, 10 PM JST] Australian Black Opal Loose Stone 0.529ct
Sale price¥15,800
Australian Black Opal 0.448ct Loose Stone
Sale price¥15,800
Australian Black Opal 0.329ct Loose
Sale price¥14,800
Loose Australian Black Opal 0.397ct
Sale price¥12,800
Brown Diamond 0.531ct Loose (FANCY DARK BROWN, SI-2)
Sale price¥39,800
Green tourmaline 0.637ct loose
Sale price¥8,800
Bicolor tourmaline 0.548ct loose
Sale price¥6,980
Bicolor tourmaline 0.552ct loose
Sale price¥12,800
Bicolor tourmaline 0.423ct loose
Sale price¥12,800
Green tourmaline 0.090ct loose stone
Sale price¥5,980
Tanzanite 0.328ct loose stone
Sale price¥8,800
Tanzanite 0.349ct loose
Sale price¥8,800
Sky blue topaz 0.563ct loose stone
Sale price¥5,980
Mexican egg-in-opal 0.672ct loose stone
Sale price¥11,000
Mexican egg-in-opal 0.865ct loose stone
Sale price¥12,800
Australian black opal 2.277ct loose stone (play of color on both sides)
Sale price¥34,800
Brazilian Imperial Topaz 0.153ct Loose
Sale price¥5,980
Brazilian Imperial Topaz 0.349ct Loose Stone
Sale price¥12,800
Brazilian Imperial Topaz 0.357ct Loose Stone
Sale price¥12,800
Iridescent Tourmaline 3.107ct Loose Stone
Sale price¥37,800
Mexican Opal 0.502ct Loose (Faceted Cut)
Sale price¥9,800
Brazilian Paraiba tourmaline in quartz 0.819ct loose
Sale price¥14,800
Bicolor tourmaline 1.198ct loose
Sale price¥12,800
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
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.