![[On sale March 7th at 10 PM] [Limited to 20 stones] Emerald gacha where you can win a 2.2ct Colombian emerald Koshu precious stone cut stone, normally 79,800 yen, or an emerald cat's eye. [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/52c80d510cb1d6f2ddbc402bf981a8a1.png?v=1772588294&width=1890)
[Clover in cut] Emerald 9mm/2.498ct {Collaboration} Loose with patch
Sale price¥69,800
[Koshu precious stone cutter pluethree] Colombian emerald 2.018ct loose
Sale price¥79,800
Aquamarine in quartz 18.954ct rough stone
Sale price¥18,800
![[Available at 10 PM on February 11th] Limited Edition of 16 Blue Stones: Bicolor Benitoite, Brazilian Paraiba Tourmaline, Santa Maria Aquamarine, and More. Discounts available for multiple purchases.](http://store.karatz.jp/cdn/shop/files/collage_f302a2d9-a4c4-45a3-8756-cdacceb9d0a2.png?v=1770270137&width=2250)
![[Jeweler's Tools] Limited Edition Chelsea Color Filter Emerald 2-Piece Set](http://store.karatz.jp/cdn/shop/files/collage_057412df-b83f-456f-b7c8-ff5d87550e46.png?v=1743666005&width=4000)
![Limited to 7 stones: One loose, oil-free Russian emerald (1.5-1.6mm, step cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010795_07720c8f-f8df-4c94-9f93-deb3d7382fb6.jpg?v=1760090374&width=4000)
![[Available at 10 PM on February 13th] Limited to 6 sets: Colombian Reverse Trapiche Emerald & Brazilian Sugarloaf Cut Emerald Set (Multiple purchase discounts available)](http://store.karatz.jp/cdn/shop/files/collage_9197464c-d272-428e-a69d-71268a1b73cf.png?v=1770868124&width=2250)
![[On sale at 10 PM on February 14th] Limited to 10 stones. Beautiful pink Brazilian morganite loose stone. Discounts available for multiple purchases.](http://store.karatz.jp/cdn/shop/files/20260130_P1280168_408c7e67-a310-403d-ad15-8d446848f508.jpg?v=1771038495&width=4000)
![[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 13.466ct loose
Sale price¥398,000
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 at 10 PM on March 8th] Colombian Emerald 0.155ct Loose](http://store.karatz.jp/cdn/shop/files/P2109261_5e621f85-24a8-4f0b-b338-43b5aec748b6.jpg?v=1772924535&width=2718)
[On Sale at 10 PM on March 8th] Colombian Emerald 0.155ct Loose
Sale price¥29,800
![[On Sale 2/13 at 10pm] Colombian Mint Emerald 5.1mm/0.517ct Loose Stone](http://store.karatz.jp/cdn/shop/files/20260201_P2058453.jpg?v=1770602452&width=4000)
[On Sale 2/13 at 10pm] Colombian Mint Emerald 5.1mm/0.517ct Loose Stone
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
![[Available at 10 PM on 2/11] 9.490ct Bicolor Beryl Loose Stone from Afghanistan (Rainbow)](http://store.karatz.jp/cdn/shop/files/20260201_P2037006.jpg?v=1770599313&width=4000)
![[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 2/6 at 10pm] Colombian Oil-Free Emerald 0.510ct Loose GIA](http://store.karatz.jp/cdn/shop/files/P6095155_97466828-4631-4e90-b4ca-7ff6f8853a18.jpg?v=1686868907&width=3464)
[On Sale 2/6 at 10pm] Colombian Oil-Free Emerald 0.510ct Loose GIA
Sale price¥598,000
![[On Sale 2/6 at 10 PM] Oil-Free Red Beryl from the United States, 2.6mm/0.050ct Loose, GIA](http://store.karatz.jp/cdn/shop/files/P9128539_b6535b54-939c-48a7-b6f3-c8d1c8e8ae6f.jpg?v=1768606430&width=2843)
Colombian pyrite emerald 8.044ct loose stone
Sale price¥188,000
![[On Sale 2/1 at 10pm] Colombian Emerald 0.451ct Loose](http://store.karatz.jp/cdn/shop/files/P1221450_64cab9a4-a405-4968-87e0-b89f5d5b8b9d.jpg?v=1769775710&width=2538)
[On Sale 2/1 at 10pm] Colombian Emerald 0.451ct Loose
Sale price¥39,800
Colombian trapiche emerald (reverse trapiche) 0.457ct rough stone
Sale price¥25,800
![[On Sale at 10 PM on February 5th] Colombian Cat's Eye Emerald 0.417ct Loose](http://store.karatz.jp/cdn/shop/files/P1305854_588919bf-651b-4a31-a41a-19a81bf4908a.jpg?v=1770208133&width=2872)
![[On Sale at 10 PM on 2/6] Brazilian Yellow Beryl 1.473ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P1307335_82b4dea1-06a1-4be1-a285-c753de4527e9.jpg?v=1770242202&width=2710)
[On Sale at 10 PM on 2/6] Brazilian Yellow Beryl 1.473ct Loose Stone
Sale price¥22,800
![[On Sale 2/7 at 10pm] Colombian Emerald Pair, 0.243ct](http://store.karatz.jp/cdn/shop/files/P1306580.jpg?v=1770007711&width=4000)
[On Sale 2/7 at 10pm] Colombian Emerald Pair, 0.243ct
Sale price¥69,800
![[On Sale 2/8 at 10pm] American Red Beryl 3.2mm/0.111ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P1306544_2a9b230b-9312-45fb-a45a-27924945b21b.jpg?v=1770418122&width=3068)
[On Sale 2/8 at 10pm] American Red Beryl 3.2mm/0.111ct Loose Stone
Sale price¥29,800
![[On Sale 2/2 at 10pm] Colombian Emerald 3.1mm/0.093ct Loose](http://store.karatz.jp/cdn/shop/files/P1263072_270eaf1d-f6f9-4284-a4d7-720c4eb4d637.jpg?v=1769861296&width=2921)
[On Sale 2/2 at 10pm] Colombian Emerald 3.1mm/0.093ct Loose
Sale price¥22,800
![[On Sale at 10 PM on January 28th] Colombian Emerald Cat's Eye 0.238ct Loose](http://store.karatz.jp/cdn/shop/files/P1220660_3cc893ad-ba42-446b-bd86-4eccf5c42cb4.jpg?v=1769482331&width=2792)
![[On Sale at 10 PM on January 26th] Colombian Cat's Eye Emerald 3.0mm/0.098ct Loose](http://store.karatz.jp/cdn/shop/files/P1210633_b80c0067-4014-4b28-a3e0-c771e8e5d9ce.jpg?v=1769301014&width=2975)
Benitoite 0.091ct loose (emerald cut)
Sale price¥25,800
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.