Mexican Opal (Faceted Cut) 0.640ct Loose
Sale price¥14,800
Mexican Opal (Faceted Cut) 0.550ct Loose
Sale price¥25,800
Mexican Fire Opal (Faceted) 6.1mm/0.450ct Loose
Sale price¥12,800
Mexican Fire Opal (Faceted Cut) 0.352ct Loose
Sale price¥9,800
Mexican Fire Opal 8.082ct Loose
Sale price¥39,800
Mexican Fire Opal 0.921ct Loose
Sale price¥14,800
Mexican Fire Opal 1.670ct Loose
Sale price¥29,800
Tanzanian Purple Tourmaline 1.230ct Loose Stone
Sale price¥8,800
Bankacha Sapphire (Black Star Sapphire) 2.110ct Loose
Sale price¥8,800
Kenyan Gold Sheen Sapphire 4.0mm/0.321ct Loose Stone (Rose Cut)
Sale price¥14,800
Synthetic Moissanite 10mm/4.147ct Loose Stone
Sale price¥16,800
Sri Lankan purple spinel 0.864ct loose stone
Sale price¥29,800
Colombian Trapiche Emerald 0.712ct Loose
Sale price¥39,800
Brazilian Blue Tourmaline 0.650ct Loose
Sale price¥9,800
Blue sapphire 0.217ct loose stone
Sale price¥15,800
Brazilian bicolor tourmaline 1.953ct loose stone
Sale price¥18,800
American Red Beryl 0.130ct Loose
Sale price¥29,800
Tanzania Color Change Chrome Tourmaline 13.194ct Loose Stone Chuhokan
Sale price¥398,000
Afghanite from Afghanistan 0.360ct loose stone
Sale price¥8,800
Afghanite from Afghanistan 0.250ct loose stone
Sale price¥6,980
Afghanite 0.333ct loose stone from Afghanistan, Japan-Germany
Sale price¥8,800
Afghanite 0.447ct loose stone from Afghanistan, Japan-Germany
Sale price¥8,800
Oregon Sunstone from the United States 0.78ct loose stone (bicolor)
Sale price¥7,980
African Tourmaline 0.711ct Loose Stone
Sale price¥5,980
Mexican Opal 1.028ct Loose
Sale price¥15,800
Mexican Fire Opal 0.934ct Loose
Sale price¥3,980
Namibian Jeremejevite 0.194ct loose stone by Nikkei
Sale price¥15,800
Padparadscha sapphire 0.337ct loose DGL version
Sale price¥45,800
Pigeon Blood Ruby 0.400ct Loose AIGS
Sale price¥55,800
Oregon Sunstone from the United States 1.331ct loose stone
Sale price¥12,800
Diamond 3.0mm/0.123ct loose stone (D, VS2, octagonal cut)
Sale price¥28,800
Mexican Opal 1.639ct Loose (Contralus Opal)
Sale price¥29,800
Tibetan bicolor andesine 1.431ct loose stone
Sale price¥12,800
Paraiba tourmaline from Brazil 0.046ct loose
Sale price¥11,800
Sri Lankan pink star sapphire 1.021ct loose stone
Sale price¥11,000
Italian Leucite 0.287ct loose stone (play of color)
Sale price¥9,800
Italian Leucite 0.321ct loose stone (play of color)
Sale price¥11,800
Brazilian bicolor tourmaline 1.660ct loose stone
Sale price¥29,800
Oregon Sunstone from the United States 1.100ct loose stone
Sale price¥12,800
Diamond 0.133ct loose stone (J, SI2)
Sale price¥29,800
Madagascar pink sapphire 0.409ct loose stone
Sale price¥12,800
Tanzanian bicolor tanzanite 1.644ct rough and loose stone set of 2
Sale price¥8,800
Synthetic Moissanite 10.5mm/4.121ct Loose Stone (Portuguese Cut)
Sale price¥24,800
[Dandelion cut] Pyrope almandine garnet 9.0mm/3.566ct loose stone
Sale price¥35,800
[Dandelion Cut] Brazilian Pink Tourmaline 7mm Loose Patch
Sale price¥55,800

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.
Written by KARATZ, book “Jewelry Illustrated Book”
The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.