[On sale from 10pm on 5/4] Russian oil-free emerald 0.84ct loose GIA
Sale price¥248,000
[On sale from 22:00 on 5/2] Russian oil-free emerald 0.570ct loose stone GIA
Sale price¥228,000
[On sale from 22:00 on 5/2] Pakistani bicolor sphene 3.980ct loose stone
Sale price¥188,000
[On sale from 22:00 on 5/2] Afghanistan Kunzite 69.735ct loose stone
Sale price¥198,000
Brazilian Paraiba Tourmaline Ring and Half Eternity Ring Set (1.2mm)
Sale price¥188,000
[On sale from 10pm on 4/20] Cornflower Blue Sapphire 4.9mm/0.55ct Loose AIGS
Sale price¥110,000
Myanmar Podretteite 0.790ct loose stone
Sale price¥198,000
Pigeon Blood Ruby 0.940ct Loose GIA
Sale price¥128,000
Brazilian Paraiba Tourmaline 0.320ct Loose GIA
Sale price¥148,000
Brazilian Paraiba Tourmaline 0.173ct loose stone (CuO: 1.9%, MnO: 1.0%)
Sale price¥158,000
Colombian pyrite emerald 27.414ct loose stone
Sale price¥298,000
Myanmar bicolor podoretite 1.960ct loose stone
Sale price¥1,000,000
Sri Lankan Musgravite 0.389ct Loose Stone (Tubular Inclusions) Nikkei
Sale price¥398,000
Unheated Royal Blue Sapphire 0.490ct Loose
Sale price¥128,000
Afghanistan Bicolor Tourmaline 2.664ct Loose Stone (Seafoam Tourmaline)
Sale price¥128,000
Brazilian cat's eye emerald 6.080ct loose stone, Japan-Germany exchange
Sale price¥298,000
Russian Demantoid Garnet (Horsetail Recognized) 5.2mm/0.661ct Loose Stone
Sale price¥198,000
American Benitoite 0.286ct loose stone
Sale price¥158,000
Madagascar Dumortierite 0.172ct loose stone (single crystal)
Sale price¥128,000
Colombian pyrite in emerald 15.291ct loose
Sale price¥1,000,000
Colombian emerald rough stone 37.764ct (Gachala mine)
Sale price¥598,000
Zimbabwe Bicolor Euclase 0.405ct Loose Stone by Nikkei
Sale price¥298,000
Myanmar Podretteite 0.407ct loose stone [Gemstone Encyclopedia]
Sale price¥128,000
Russian diamond rough (sawable) 0.618ct rough (trigon)
Sale price¥228,000
13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm)
Sale price¥158,000
Pt900 Russian Demantoid Garnet (Horsetail) 0.30ct and Diamond 0.30ct Ring
Sale price¥128,000
Tanzanian Almandine Garnet 34.581ct Loose Stone
Sale price¥158,000
Pt900 Kashmir unheated sapphire 1.14ct / diamond 0.70ct ring GIA
Sale price¥1,580,000

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.