Hackmanite from Afghanistan 4.0mm/0.181ct loose stone
Sale price¥9,800
Sri Lankan Purple Sapphire 0.797ct Loose
Sale price¥18,800
Purple sapphire 0.419ct loose stone
Sale price¥15,800
Afghanistan Hackmanite 0.364ct loose stone
Sale price¥15,800
Hackmanite rough stone from Afghanistan, 7.183ct
Sale price¥39,800
Madagascar pink sapphire 0.335ct loose stone
Sale price¥14,800
Madagascar Purple Sapphire 0.440ct Loose
Sale price¥18,800
Madagascar Purple Sapphire 0.429ct Loose
Sale price¥12,800
Madagascar Purple Sapphire 0.523ct Loose
Sale price¥15,800
Blue beryl (Macis beryl) 0.215ct loose stone
Sale price¥9,800
Blue beryl (Macisi beryl) 0.303ct loose stone
Sale price¥12,800
Blue beryl (Macis beryl) 0.199ct loose stone
Sale price¥9,800
Blue beryl (Macis beryl) 0.162ct loose stone
Sale price¥8,800
Madagascar Purple Sapphire 0.433ct Loose Stone
Sale price¥14,800
Indian Iolite Sunstone 0.359ct Loose Stone
Sale price¥12,800
Indian Iolite Sunstone 0.325ct Loose Stone
Sale price¥9,800
Indian Iolite Sunstone 4.1mm/0.230ct Loose Stone
Sale price¥8,800
Sri Lankan purple spinel 0.864ct loose stone
Sale price¥29,800
Myanmar spinel 0.402ct loose stone
Sale price¥12,800
Myanmar spinel 4.0mm/0.263ct loose stone
Sale price¥7,980
Color shift amethyst 4.191ct loose stone
Sale price¥14,800
Color shift amethyst 1.216ct loose stone
Sale price¥8,800
Hackmanite from Afghanistan, 15.600ct rough stone
Sale price¥8,800
Myanmar Purple Spinel 0.519ct Loose Stone
Sale price¥9,800
Myanmar Purple Spinel 0.434ct Loose Stone
Sale price¥12,800
Tanzanite from Tanzania 1.522ct loose stone
Sale price¥55,800
Tanzanite from Tanzania 0.804ct loose stone
Sale price¥24,800
Tanzanite from Tanzania 0.856ct loose stone
Sale price¥29,800
Mozambique pink tourmaline 1.065ct loose stone
Sale price¥15,800
Mozambique Rubellite 1.706ct Loose Stone
Sale price¥39,800
Tanzanite from Tanzania 1.140ct loose stone
Sale price¥39,800
[Koshu Precious Stones plusthree] Amethyst 4.306ct Loose Stone Patch
Sale price¥25,800
Tanzanite from Tanzania 6.5mm/0.945ct loose stone
Sale price¥28,800
Tanzanite from Tanzania 1.577ct loose stone
Sale price¥49,800
Tanzanite from Tanzania 0.767ct loose stone
Sale price¥29,800
Tanzanite from Tanzania 1.243ct loose stone
Sale price¥45,800
Tanzanite from Tanzania 0.567ct loose stone
Sale price¥14,800
Tanzanite from Tanzania 2.011ct loose stone
Sale price¥65,800
Fluorite rough stone from Yaogangshan, China, 72.518ct
Sale price¥9,800
South African Sugilite 1.330ct loose stone
Sale price¥22,800
Tanzania Color Change Garnet 0.789ct Loose Stone
Sale price¥9,800
Tanzanite from Tanzania 1.250ct loose stone
Sale price¥22,800
Purple sapphire 4mm/0.273ct loose stone
Sale price¥12,800
Sri Lankan Star Sapphire 5.225ct Loose
Sale price¥98,000

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.