![[On sale May 5 at 10 PM] Untreated Sri Lankan Sapphire (Glass Body/Sapphire Crystal) 142.434 ct Rough with Certification](http://store.karatz.jp/cdn/shop/files/P1305718_0f25521f-68a8-45da-9c82-fe4b7c3ff2d0.jpg?v=1777594543&width=4000)
![[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery](http://store.karatz.jp/cdn/shop/files/collage_c90ad5e1-b47a-49f9-b7d7-d75e04cd883a.png?v=1724920180&width=2000)
![[Limited to 6 stones] Contains 2 stones in total: 1 gemstone (rough stone) that is actually featured in a gemstone encyclopedia + 1 emerald rough stone.](http://store.karatz.jp/cdn/shop/files/collage_5fd345f1-1646-43a1-b347-1e83dd089a63.png?v=1751925957&width=2000)
Bicolor Zoisite 0.823ct rough stone
Sale price¥6,980
Purple Zoisite 2.617ct rough stone
Sale price¥9,800
Bicolor Tanzanite 1.677ct rough stone
Sale price¥7,980
Bicolor Tanzanite 5.582ct rough stone
Sale price¥18,800
Colombian emerald 0.153ct rough stone
Sale price¥6,980
Colombian emerald 0.499ct rough stone
Sale price¥14,800
Colombian emerald 0.443ct rough stone
Sale price¥8,800
Zimbabwean Bi-Color Euclase Rough 2.976 ct
Sale price¥59,800
Euclase with Pyrite from Colombia 37.340ct Rough Gemstone (Hokikyosho)
Sale price¥15,800
Colombian emerald with pyrite 0.248ct rough stone
Sale price¥12,800
Bicolor Euclase from Zimbabwe 0.596ct Rough
Sale price¥29,800
Uncut Zimbabwe Euclase 0.443ct
Sale price¥29,800
Bicolor Euclase from Zimbabwe 0.539ct Rough
Sale price¥25,800
Oregon Sunstone 8.256ct rough stone
Sale price¥9,800
Zimbabwe Green Diamond Rough (Sawable) 0.428ct Rough Stone with Trigon
Sale price¥158,000
Indian Cavansite 240.461ct rough stone
Sale price¥8,800
Aquamarine in quartz 18.954ct rough stone
Sale price¥18,800
Australian shell opal 53.277ct rough stone
Sale price¥59,800
Zimbabwe Green Diamond Rough (Sawable) 0.402ct Rough Stone with Trigon
Sale price¥148,000
Diamond rough (makeable) 0.284ct rough
Sale price¥12,800
Colombian pyrite emerald 2.380ct rough stone
Sale price¥39,800
Colombian emerald 8.90ct rough stone
Sale price¥69,800
0.338ct Canadian Green Diamond Rough (Sawable) - With Trigons
Sale price¥128,000
Colombian trapiche emerald (reverse trapiche) 0.457ct rough stone
Sale price¥25,800
Oil-in-quartz 24.653ct rough stone from Madagascar
Sale price¥7,980
Oil-in-quartz 31.973ct rough stone from Madagascar
Sale price¥8,800
Oil-in-quartz 30.677ct rough stone from Madagascar
Sale price¥8,800
South African yellow diamond (makeable) 0.159ct rough stone
Sale price¥12,800
Canadian rough diamond (sawable) 0.096ct rough with trigon
Sale price¥29,800
Oil-in-quartz 22.073ct rough stone from Madagascar
Sale price¥4,980
Ubaite/dravite tourmaline 3.157ct rough stone
Sale price¥6,980
Uncut Canadian diamond (sawable) 0.103ct
Sale price¥29,800
South African yellow diamond (makeable) 0.202ct rough stone
Sale price¥15,800
South African gray diamond (makeable) 0.169ct rough stone
Sale price¥14,800
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.