![[On Sale 2/23 10pm] Zimbabwe Green Diamond Rough (Sawable) 0.402ct Rough with Trigon](http://store.karatz.jp/cdn/shop/files/P1210062_bb06fe90-b517-4a19-bfce-ca8a9e31cdfe.jpg?v=1771722369&width=4000)
Colombian trapiche emerald (reverse trapiche) 3.6mm/0.168ct rough stone
Sale price¥12,800
Colombian trapiche emerald (reverse trapiche) 0.135ct rough stone
Sale price¥9,800
Colombian trapiche emerald (reverse trapiche) 0.131ct rough stone
Sale price¥12,800
![[On sale from 10pm on 2/11] Diamond rough (makeable) 0.353ct rough](http://store.karatz.jp/cdn/shop/files/20260201_P2036912.jpg?v=1770679177&width=4000)
[On sale from 10pm on 2/11] Diamond rough (makeable) 0.353ct rough
Sale price¥14,800
![[On sale from 10pm on 2/11] Diamond rough (makeable) 0.279ct rough](http://store.karatz.jp/cdn/shop/files/20260201_P2036870_cc6664e0-bc15-48e2-bd48-add5bad299ac.jpg?v=1770679178&width=2766)
[On sale from 10pm on 2/11] Diamond rough (makeable) 0.279ct rough
Sale price¥9,800
![[On sale from 10pm on 2/11] Diamond rough (makeable) 0.284ct rough](http://store.karatz.jp/cdn/shop/files/20260201_P2036828.jpg?v=1770679177&width=4000)
[On sale from 10pm on 2/11] Diamond rough (makeable) 0.284ct rough
Sale price¥12,800
![[On Sale 2/10 at 10pm] Colombian Emerald with Pyrite, 2.380ct Rough](http://store.karatz.jp/cdn/shop/files/P2036794.jpg?v=1770507819&width=4000)
[On Sale 2/10 at 10pm] Colombian Emerald with Pyrite, 2.380ct Rough
Sale price¥39,800
![[On Sale at 10 PM on February 10th] Colombian Emerald 8.90ct Rough Stone](http://store.karatz.jp/cdn/shop/files/P2036690_89ce4dde-b080-4b35-8349-9757a69e0a89.jpg?v=1770507062&width=2986)
[On Sale at 10 PM on February 10th] Colombian Emerald 8.90ct Rough Stone
Sale price¥69,800
![[On Sale 2/8 at 10 PM] Canadian Green Diamond Rough (Sawable) 0.338ct Rough (with Trigon)](http://store.karatz.jp/cdn/shop/files/P1190545.jpg?v=1770415881&width=4000)
![[On Sale 2/8 at 10 PM] Angola Green Diamond Rough (Sawable) 0.528ct Rough (with Trigon)](http://store.karatz.jp/cdn/shop/files/P1190612.jpg?v=1769224707&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)
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
Bicolor tourmaline 3.242ct rough stone from Afghanistan
Sale price¥5,980
South African yellow diamond (makeable) 0.159ct rough stone
Sale price¥12,800
![[On Sale at 10 PM on January 26th] Canadian Rough Diamond (Sawable) 0.096ct Rough Stone with Trigon](http://store.karatz.jp/cdn/shop/files/P1210317_bfb4a922-af05-4fe6-a413-4fc926984090.jpg?v=1769300534&width=2715)
![[On Sale at 10 PM on January 26th] Canadian Rough Diamond (Sawable) 0.099ct Rough Stone with Trigon](http://store.karatz.jp/cdn/shop/files/P1210295_8df7e90f-c749-42e3-ad74-add35f15e3b7.jpg?v=1769300344&width=2870)
Oil-in-quartz 22.073ct rough stone from Madagascar
Sale price¥4,980
Ubaite/dravite tourmaline 3.157ct rough stone
Sale price¥6,980
![[On Sale at 10 PM on January 25th] Canadian Rough Diamond (Sawable) 0.103ct Rough Stone](http://store.karatz.jp/cdn/shop/files/P1190498.jpg?v=1769241204&width=4000)
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
Demantoid garnet 15.468ct rough stone from Madagascar
Sale price¥9,800
![[On Sale at 10 PM on January 12th] 0.466ct Sawable Diamond Rough Stone (with Trigon)](http://store.karatz.jp/cdn/shop/files/P1088079.jpg?v=1768172012&width=4000)
![[On sale at 10pm on 1/12] Diamond rough (makeable) 0.204ct rough](http://store.karatz.jp/cdn/shop/files/P1088037.jpg?v=1768086585&width=4000)
[On sale at 10pm on 1/12] Diamond rough (makeable) 0.204ct rough
Sale price¥39,800
![[1/12 22:00 Sale] Diamond 0.604ct Rough Stone](http://store.karatz.jp/cdn/shop/files/P1087995.jpg?v=1768086372&width=4000)
[1/12 22:00 Sale] Diamond 0.604ct Rough Stone
Sale price¥12,800
Yellow diamond rough stone (makeable) 0.247ct rough stone
Sale price¥22,800
Colombian emerald rough stone 13.577ct
Sale price¥18,800
Colombian emerald 8.169ct rough stone
Sale price¥9,800
Colombian emerald rough stone 7.924ct
Sale price¥9,800
Colombian emerald rough stone 6.933ct
Sale price¥9,800
Colombian emerald rough stone 5.895ct
Sale price¥9,800
[12551692] Colombian Trapiche Emerald 0.538ct Rough Stone
Sale price¥22,800
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.