![[Sale on 5/17 at 10 PM] Brazilian Paraiba Tourmaline 0.038ct Loose Stone (CuO: 1.6%, MnO: 2.8%)](http://store.karatz.jp/cdn/shop/files/PC060216_faed4771-d083-4ba2-874c-ff26a6b9446c.jpg?v=1702080534&width=3190)
![[On sale May 17th, 10 PM] Brazilian Paraiba Tourmaline 0.035ct Loose Stone (CuO: 2.4%, MnO: 2.5%)](http://store.karatz.jp/cdn/shop/files/PC060096_cbbead0f-f658-466d-bfe8-f353822160e0.jpg?v=1702421084&width=3613)
![[On sale May 17th, 10 PM JST] Brazilian Paraiba Tourmaline 0.050ct Loose Stone (CuO: 1.9%, MnO: 3.6%)](http://store.karatz.jp/cdn/shop/files/PC060064_986e097c-d9d4-4d12-bbe1-aab610692eee.jpg?v=1702421170&width=3252)
![[On sale May 16, 10 PM JST] Brazilian Paraiba Tourmaline 0.039ct Loose Stone (CuO:1.6%, MnO:2.9%)](http://store.karatz.jp/cdn/shop/files/PC060034_845cab0d-64a9-4b88-8e21-86048c1b4681.jpg?v=1702168763&width=3509)
![[For Sale 10:00 PM May 16th] Brazilian Paraiba Tourmaline 0.035ct Loose Stone (CuO: 1.6%, MnO: 3.3%)](http://store.karatz.jp/cdn/shop/files/PC060004_43d6b30d-df57-4983-b854-e2aa9731b664.jpg?v=1702168845&width=3394)
[On sale June 7th at 10 PM] Australian Boulder Opal 41.775ct Loose Stone
Sale price¥19,800
[On sale June 7, 10 PM JST] Australian Boulder Opal 12.216ct Loose Stone
Sale price¥15,800
[Sale on May 24th at 10 PM JST] Australian Black Opal 0.216ct Loose
Sale price¥11,000
[On sale 5/22 at 10 PM] Australian Black Opal 0.325ct Loose Stone
Sale price¥9,800
[On Sale May 22 at 10 PM JST] Australian Black Opal 1.393ct Loose Stone
Sale price¥48,800
![[On sale May 4th, 10 PM JST] Bicolor Benitoite from USA, 0.624 ct loose stone with鑑別書](http://store.karatz.jp/cdn/shop/files/P4146107_bde5edf5-3b59-499c-9f77-602154ca5a17.jpg?v=1777685262&width=2873)
[On sale May 2nd at 10 PM JST] K18 Peridot Chain Ring
Sale price¥22,800
Benitoite 0.231ct loose
Sale price¥220,000
Benitoite 0.286ct loose
Sale price¥258,000
Benitoite 0.272ct loose stone (emerald cut)
Sale price¥248,000
Cristobalite in Quartz 2.417ct Loose Stone
Sale price¥8,800
Mexican Fire Opal 0.290ct Loose (Faceted Cut)
Sale price¥6,980
Mexican Hyalite Opal 0.774ct Loose (Faceted Cut)
Sale price¥8,800
Mexican Fire Opal (faceted) 0.645ct Loose Stone
Sale price¥18,800
Brazilian Bicolor Tourmaline 0.780ct Loose
Sale price¥12,800
K18 Peridot and Diamond 0.03ct Ring
Sale price¥45,800
K18 Peridot and Diamond 0.03ct Ring
Sale price¥45,800
[Colorful] Pt950 Play Night Pendant Top (Necklace Top)
Sale price¥69,800
Benitoite from the USA, 3.4mm/0.175ct loose
Sale price¥98,000
[Colorful] Pt900 Black Opal 0.83ct / Diamond 0.62ct Ring with Certificate
Sale price¥228,000
Brazilian Paraiba Tourmaline In Quartz 0.50mm/.313ct Loose
Sale price¥15,800
Parasitic Peridot 0.220ct Loose Stone with Certificate
Sale price¥79,800
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.
KARATZ's Initiatives and Social Contributions
We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.
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.