![[8/29 10 PM Sale] <<11 Stones Only>> Raw Emerald from Muzo, Colombia (Avg. 0.20ct) <<multi-purchase discount available>></multi-purchase>](http://store.karatz.jp/cdn/shop/files/collage_8a983e9d-ab06-40f8-8ca8-32257c5ebc00.png?v=1787903111&width=2000)
![[On sale August 12th at 10 PM] "Limited to 15 Stones" Diamond Gacha featuring rare butterfly-cut diamonds "Multiple Purchase Discount Available"](http://store.karatz.jp/cdn/shop/files/2026-08-0717.06.55.png?v=1786090036&width=1279)
![[Limited to 18 stones] [Mr. KEN] 1 stone loose Andalusite from Spain (Rose cut, 4.0mm) [Multiple purchase discount] [Yuichiro Abe's work motif]](http://store.karatz.jp/cdn/shop/files/collage_cd13e4f3-2d31-4d02-b9d3-66c868acfcc9.jpg?v=1706791241&width=4000)
Additional charge for resizing: ¥7,750
Sale price¥7,750
![Limited to 7 stones: Brazilian Limonite in Quartz, 1 loose stone (average 6 carats) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_10790d8c-055f-404e-b91b-4dc8a6f1ff16.png?v=1756029326&width=2000)
Additional charge for resizing: +6,000 yen
Sale price¥6,000
【10/25 22時販売】《限定7セット》タンザニア産ミントダイオプサイド2石セット（原石＆訳ありルース）《複数購入割引有》
Sale price¥5,980
![[On sale 10/30 at 22:00] 《Limited to 3 stones》 Oxblood red coral from Kochi Prefecture, half-drilled (8.7mm, top-color equivalent) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/PA061324_4217c560-3782-4f8c-9aa1-e3fa5a2264e0.jpg?v=1791680300&width=4000)
![[On sale 10/31 at 10 PM] 《Limited to 5 stones》 1 Sri Lankan Uva Moonstone Loose Stone (New Lumina Star Cut, by Mr. Sanje, avg. 0.5ct) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/collage_055269e3-e881-48d7-8e6b-be69a2c72be1.png?v=1791681460&width=2000)
![[Available Oct 9, 10:00 PM] <<limited quantity>> Lab-Grown Diamond Cabochon Loose Stone (1pc) (CVD / 2.4-2.7mm) <<multi-purchase discount available>></multi-purchase></limited>](http://store.karatz.jp/cdn/shop/files/PA020298.jpg?v=1791188631&width=4000)
![[Available 10/3 at 10:00 PM] <limited to stones> Chic-colored FANCY color diamond gacha, sourced in Hong Kong, 1 loose stone (avg. 0.35ct) <multi-purchase discount available></multi-purchase></limited>](http://store.karatz.jp/cdn/shop/files/collage_3e17ed11-0933-4397-ab56-b8095908190a.png?v=1790933063&width=2000)
![[On sale 9/4 at 10:00 PM] 《Limited to 7 stones》 Colombian mint-colored emerald rough (average 0.51ct) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/collage_4a80269b-3a4f-4b51-bce8-58c65252f527.png?v=1788335435&width=2000)
![[Sale starts August 21st, 10 PM JST] Limited 6 stones: Sri Lankan Uba Moonstone (round buff top cut, 6mm) - Multi-purchase discount available](http://store.karatz.jp/cdn/shop/files/P8070234.jpg?v=1787050510&width=4000)
Synthetic Rutile 0.554ct Loose
Sale price¥8,800
1.008ct Tanzanian orange zircon loose stone
Sale price¥9,800
Opal 0.123ct loose stone
Sale price¥5,980
Additional charge for resizing: 1,500 yen
Sale price¥8,500
![[Limited to 4 stones] Synthetic moissanite 1 stone loose (rose cut, 5.0mm) [Discount available for multiple purchases]](http://store.karatz.jp/cdn/shop/files/P1260004.jpg?v=1706272442&width=4000)
Mexican Hyalite Opal 2.592ct loose
Sale price¥9,800
Additional charge for resizing: 5,250 yen
Sale price¥5,250
Repair fee + ¥8,800
Sale price¥8,800
Indian Moonstone 6.2mm/0.749ct Loose
Sale price¥7,980
Brazilian rutilated quartz (rutile quartz) 12mm/7.140ct loose stone
Sale price¥8,800
Brazilian rutilated quartz (rutile quartz) 12mm/6.709ct loose stone
Sale price¥8,800
Emerald 0.484ct loose
Sale price¥7,980
Tanzania Bicolor Zoisite 0.450ct Loose Stone
Sale price¥8,800
Tanzanite from Tanzania 0.478ct loose stone
Sale price¥8,800
Tanzanite from Tanzania 0.351ct loose stone
Sale price¥8,800
Tanzania Green Zoisite 0.335ct Loose Stone
Sale price¥9,800
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.