Bicolor tourmaline 3.468ct loose stone
Sale price¥6,980
Bicolor tourmaline 7.532ct loose stone
Sale price¥9,800
Bicolor tourmaline 7.809ct loose stone
Sale price¥9,800
Bicolor tourmaline 1.258ct loose
Sale price¥12,800
Brazilian bicolor tourmaline 1.248ct loose stone
Sale price¥18,800
Brazilian bicolor tourmaline 0.502ct loose stone
Sale price¥12,800
Mozambique Pink Tourmaline 1.122ct Loose Stone (Contains CuO)
Sale price¥39,800
Brazilian Paraiba Tourmaline 0.759ct rough stone
Sale price¥45,800
K18PG Brazilian Paraiba Tourmaline 0.286ct Grandidierite Ring GIA
Sale price¥198,000
Brazilian Paraiba Tourmaline 0.200ct loose stone (CuO: 1.7%, MnO: 2.8%)
Sale price¥98,000
Brazilian Paraiba Tourmaline 0.821ct rough stone
Sale price¥39,800
Brazilian Green Tourmaline 26.071ct Loose Stone (Sugarloaf Cut)
Sale price¥298,000
Brazilian bicolor tourmaline 6.928ct loose stone (bicolor blue tourmaline)
Sale price¥298,000
Canary Yellow Tourmaline from Mozambique 0.223ct loose stone
Sale price¥8,800
Brazilian Watermelon Tourmaline Rough Stone 7.959ct
Sale price¥12,800
Brazilian pink tourmaline 1.458ct loose stone
Sale price¥39,800
Brazilian Tourmaline (untreated) 5.120ct loose stone
Sale price¥39,800
Brazilian Green Tourmaline 0.182ct Loose Stone
Sale price¥8,800
Tourmaline 1.099ct loose
Sale price¥12,800
Brazilian Indigolite Tourmaline 3.613ct Loose Stone, Japan-Germany Exchange
Sale price¥128,000
Brazilian Paraiba tourmaline 95.717ct raw stone
Sale price¥12,800
Brazilian Paraiba Tourmaline 79.832ct rough stone
Sale price¥15,800
Watermelon Tourmaline 9.232ct Loose Stone
Sale price¥12,800
Watermelon tourmaline 7.799ct rough stone
Sale price¥11,800
Watermelon tourmaline 6.575ct rough stone
Sale price¥9,800
Brazilian Green Tourmaline 12.252ct Loose Stone
Sale price¥398,000
Brazilian Paraiba Tourmaline 0.233ct loose stone (CuO: 1.6%. MnO: 2.4%)
Sale price¥358,000
Paraiba tourmaline from Brazil 0.154ct loose
Sale price¥29,800
[Rouge cut] Pink tourmaline 0.422ct loose stone
Sale price¥6,980
Brazilian Pink Tourmaline 0.418ct Loose Stone (Rouge Cut)
Sale price¥9,800
[Cat cut] Pink tourmaline 4.5mm/0.302ct loose stone
Sale price¥6,980
Brazilian Paraiba Tourmaline 0.360ct Loose GIA
Sale price¥298,000

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.