Paraiba Tourmaline from Mozambique 2.037ct loose stone with gem analysis
Sale price¥598,000
Unheated Burmese pink spinel 1.430ct loose AIGS
Sale price¥188,000
Russian demantoid garnet (horsetail recognized) 5.2mm/0.702ct loose
Sale price¥228,000
Colombian pyrite in emerald 4.592ct loose
Sale price¥128,000
Chrysoberyl cat's eye from Sri Lanka 5.176ct loose
Sale price¥198,000
Bicolor tourmaline 22.088ct loose
Sale price¥288,000
Pink spinel 3.208ct loose
Sale price¥128,000
Bicolor tourmaline 5.825ct loose
Sale price¥128,000
Rhodochrosite 1.884ct loose from Detroit City, USA
Sale price¥198,000
Parasite Peridot (Paracytic Peridot) 0.541ct Loose Japanese-German Edition
Sale price¥256,000
Bicolor Benitoite 0.194ct loose (square cut)
Sale price¥128,000
Bicolor Benitoite 0.282ct loose
Sale price¥220,000
Green Zoisite 3.617ct loose
Sale price¥118,000
Pink zoisite from Tanzania 6.7mm/1.393ct loose (peach tanzanite)
Sale price¥148,000
Colombian pyrite in emerald 7.836ct loose
Sale price¥398,000
Unheated Brazilian Paraiba tourmaline 0.108ct loose
Sale price¥128,000
Celestite from Madagascar 7.080ct loose Japanese and German
Sale price¥148,000
Musgravite from Myanmar 0.546ct loose Japanese German edition
Sale price¥128,000
Lavender Jade (Jade) 78.496ct Loose Medium Treasure
Sale price¥258,000
Brazilian Paraiba tourmaline 0.275ct loose (CuO:1.5%.MnO:2.3%)
Sale price¥358,000
Paraiba tourmaline from Brazil 0.154ct loose (CuO:1.1wt%, MnO:1.4wt%)
Sale price¥128,000
Royal blue sapphire 1.44ct loose GIA
Sale price¥188,000
Brazilian particolor Paraiba tourmaline 0.26ct loose GIA
Sale price¥598,000
Unheated Brazilian Color Change Paraiba Tourmaline 0.30ct Loose GIA
Sale price¥1,280,000
Bicolor pink euclase from Brazil 3.210ct loose Japanese-German edition
Sale price¥988,000
Paracytic peridot 0.536ct loose
Sale price¥188,000
Brazilian Pink Imperial Topaz 1.907ct Loose Japanese-German Edition
Sale price¥118,000
Australian opal 14.837ct loose
Sale price¥118,000
Watermelon tourmaline 44.201ct Ruth Japanese-German book
Sale price¥398,000
Paudlettite 0.375ct loose Japanese-German book
Sale price¥298,000
Particolor tourmaline 32.207ct loose (tricolor tourmaline)
Sale price¥398,000
Russian demantoid garnet (horsetail recognized) 5.8mm/0.876ct loose
Sale price¥298,000
Russian demantoid garnet (horsetail recognized) 5.3mm/0.633ct loose
Sale price¥248,000
Bangkacha sapphire (star sapphire) 69.655ct loose
Sale price¥198,000
Non-oil red beryl 0.200ct loose GIA
Sale price¥188,000
Emerald 15.219ct loose Japanese-German book
Sale price¥298,000
Bicolor Sphene 4.50ct loose
Sale price¥258,000
Colombian Euclase 548.00ct rough stone
Sale price¥248,000
Kunzite 50.260ct loose
Sale price¥198,000
Diamond 0.618ct loose (I, I1, tree cut)
Sale price¥148,000
Cambodian Blue Zircon (Ratanakiri Blue) 23.12ct Loose
Sale price¥498,000
![[Made to order] "Rhino Ring" by special modeling artist Masatoshi Asami {Exhibited at Ueno Marui}](http://store.karatz.jp/cdn/shop/products/P6150002_4e5e545f-8283-4842-b3b0-294ce01bc871.jpg?v=1655355285&width=4000)
![[Shipping in late July 2025] Adult Sebonstar Pendant Precious Model (Pt950, K18YG, K18PG)](http://store.karatz.jp/cdn/shop/files/4b20f821b247baeba4e6ddc6a353084f.jpg?v=1738627851&width=4000)
![[Shipping in late July 2025] Adult Sebonstar Ring Precious Model (Pt950, K18YG, K18PG)](http://store.karatz.jp/cdn/shop/files/9b191a7aeacff3846bad816850f883eb.jpg?v=1738627858&width=4000)
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.
So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.
業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。
KARATZ Books
These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.
jeweler's tools
For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.