Colombian trapiche emerald (reverse trapiche) 0.134ct rough stone
Sale price¥12,800
![[Koshu Precious Stones Plusthree] Smoky Quartz 0.657ct Loose Patch](http://store.karatz.jp/cdn/shop/files/P1185356.jpg?v=1752322391&width=4000)
[Koshu Precious Stones Plusthree] Smoky Quartz 0.657ct Loose Patch
Sale price¥19,800
Sapphire from Sri Lanka (Safarin) 0.245ct loose
Sale price¥12,800
Brazilian alexandrite 0.151ct loose
Sale price¥25,800
Brazilian dumortierite in quartz 3.077ct loose
Sale price¥12,800
Australian Iron Opal 20.328ct Loose Stone, Nikko Kan
Sale price¥12,800
Mongolian color change andesine 0.665ct loose stone
Sale price¥12,800
Mongolian color change andesine 0.749ct loose stone
Sale price¥12,800
Brazilian bicolor tourmaline 0.880ct loose stone
Sale price¥12,800
Mexican Cantera Opal 2.661ct Loose
Sale price¥12,800
Mexican Cantera Opal 1.209ct Loose Stone (Rose Cut)
Sale price¥12,800
Mexican Cantera Opal 1.394ct Loose Stone (Rose Cut)
Sale price¥12,800
Synthetic rutile 5mm/0.642ct loose stone
Sale price¥12,800
Synthetic rutile 5mm/0.585ct loose
Sale price¥12,800
Ruby from Greenland 0.307ct loose with certificate
Sale price¥15,800
Mexican Fire Opal 1.624ct Loose (Contralus Opal)
Sale price¥12,800
Paudretite from Myanmar 0.193ct loose sunflower beads
Sale price¥29,800
Kenyan Gold Sheen Sapphire 4.1mm/0.409ct Loose
Sale price¥22,800
Montana Sapphire 0.119ct loose
Sale price¥12,800
Colombian Trapiche Emerald (Reverse Trapiche) 4.3mm/0.329ct Rough Stone
Sale price¥29,800
Mexican Cantera Opal 1.436ct Loose Stone (Rose Cut)
Sale price¥12,800
Mexican Cantera Opal 1.383ct Loose Stone (Rose Cut)
Sale price¥12,800
Mexican cantera opal 32.560ct loose
Sale price¥29,800
Ruby from Greenland 0.421ct loose with certificate
Sale price¥18,800
Brazilian Tinkerbell Quartz (Pink Fire Quartz) 3.041ct loose
Sale price¥18,800
Australian boulder opal 14.860ct loose
Sale price¥18,800
Mexican cantera opal 14.740ct loose
Sale price¥14,800
Tanzanian Dragon Garnet 0.746ct Loose Stone
Sale price¥17,800
Diamond (cabochon cut) 0.196ct loose
Sale price¥29,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.708ct Loose Stone
Sale price¥15,800
0.400ct Madagascar Pink Sapphire Loose (Heart Shape)
Sale price¥19,800
Sri Lankan saffron 0.320ct loose stone with certificate of authenticity
Sale price¥29,800
American Benitoite 2.8mm/0.104ct Loose Stone
Sale price¥28,800
Russian demantoid garnet (horsetail recognized) 2.8mm/0.187ct loose
Sale price¥18,800
Russian demantoid garnet (horsetail recognized) 2.9mm/0.165ct loose
Sale price¥24,800
Mexican Cantera Opal 1.086ct Loose (Faceted)
Sale price¥12,800
![[Shipping in late July 2025] Adult Sebonstar Pendant Silver Model (SV925)](http://store.karatz.jp/cdn/shop/files/4b20f821b247baeba4e6ddc6a353084f.jpg?v=1738627851&width=4000)
![[Shipping in late July 2025] Adult Sebonstar Ring Silver Model (SV925)](http://store.karatz.jp/cdn/shop/files/9b191a7aeacff3846bad816850f883eb.jpg?v=1738627858&width=4000)
![[Sales end on Monday, June 30th] TV anime "The Apothecary Diaries" x KARATZ collaboration Neko Neko modeling](http://store.karatz.jp/cdn/shop/files/kusuriya_bnr_02_1080x1080_f19106a0-c741-4153-bb38-6ba5d81e262f.jpg?v=1744591968&width=1080)
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.