Australian boulder opal 13.190ct loose
Sale price¥19,800
Australian boulder opal 14.860ct loose
Sale price¥19,800
Australian boulder opal 9.020ct loose
Sale price¥19,800
Green opal 15.950ct loose
Sale price¥39,800
Mexican fire opal 6.742ct loose
Sale price¥98,000
Cantera opal 14.581ct loose
Sale price¥45,800
Opal 21.584ct loose Japanese and German
Sale price¥8,800
Mexican fire opal 6mm/0.737ct loose (rose cut)
Sale price¥19,800
Mexican fire opal 6mm/0.756ct loose (rose cut)
Sale price¥18,800
Mexican fire opal 6mm/0.698ct loose (rose cut)
Sale price¥18,800
Mexican Fire Opal 1.808ct Loose
Sale price¥35,800
Mexican Fire Opal 1.624ct Loose
Sale price¥32,800
Mexican Opal 1.679ct Loose
Sale price¥39,800
Opal from Mexico 0.276ct loose
Sale price¥18,800
Mexican Opal 0.498ct Loose
Sale price¥24,800
Mexican Fire Opal 0.359ct Loose
Sale price¥19,800
Mexican Fire Opal 5mm/0.342ct Loose
Sale price¥18,800
[Star in cut] Mexican fire opal 7mm/0.678ct loose with patch
Sale price¥49,800
[Colorful] K18 boulder opal 3.290ct diamond ring
Sale price¥79,800
Mexican cantera opal 34.760ct loose
Sale price¥39,800
Mexican cantera opal 32.560ct loose
Sale price¥39,800
Mexican cantera opal 27.410ct loose
Sale price¥49,800
[Sakura Incut] Opal from Mexico 9mm/1.532ct loose
Sale price¥69,800
Black opal 2.293ct loose
Sale price¥98,000
Mexican Fire Opal 0.353ct Loose
Sale price¥6,980
Mexican fire opal 0.230ct loose
Sale price¥6,980
Opal 0.101ct loose stone
Sale price¥8,800
Mexican Opal 0.561ct Loose
Sale price¥19,800
Mexican Fire Opal 0.591ct Loose
Sale price¥35,800
Mexican Opal 0.264ct Loose
Sale price¥8,800
Opal 0.458ct loose
Sale price¥12,800
Opal 0.536ct loose stone
Sale price¥8,800
Mexican cantera opal 12.401ct loose
Sale price¥15,800
Mexican cantera opal 4.711ct loose
Sale price¥15,800
Opal 426.985ct rough stone
Sale price¥39,800
Mexican cantera opal 8.454ct loose
Sale price¥6,980
Fire opal 1.547ct loose
Sale price¥12,800
Iron opal 177.315ct loose
Sale price¥22,800
Opal 168.640ct rough stone
Sale price¥29,800
[Koshu Precious Stone Kiriko] Mexican Fire Opal 1.571ct Loose with Patch
Sale price¥79,800
[Sakura Incut] Mexican water opal 6mm loose with patch
Sale price¥29,800
[Camellia cut] Mexican fire opal 1.270ct loose with patch
Sale price¥98,000
Opal from Mexico 1.139ct loose
Sale price¥69,800
Cantera Opal 2.661ct loose
Sale price¥12,800
Mexican Opal 8mm/1.430ct Loose
Sale price¥39,800

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.