Birthstone list
Bicolor tourmaline 0.880ct loose
Sale price¥8,800
Bicolor tourmaline 1.220ct loose
Sale price¥15,800
Diamond 2.810ct rough stone
Sale price¥9,800
Colombian emerald cat's eye 0.417ct loose
Sale price¥39,800
[On sale at 10pm on August 19th] Sliced Trapiche Diamond 0.228ct Loose
Sale price¥18,800
[On Sale at 10 PM on August 17th] Mexican Cantera Opal 2.125ct Loose
Sale price¥39,800
Brazilian Rainbow Aquamarine (Iridescent Aquamarine) 3.188ct Loose Stone
Sale price¥15,800
[On Sale at 10 PM on August 16th] Mexican Cantera Opal 5.882ct Loose
Sale price¥39,800
[8/16 22:00 Sale] Sri Lankan Yellow Sapphire 0.300ct Loose
Sale price¥15,800
Russian oil-free emerald 0.570ct loose stone GIA
Sale price¥298,000
![[On Sale at 10 PM on August 11th] Afghanistan Oil-Free Emerald 0.100ct Loose GIA](http://store.karatz.jp/cdn/shop/files/P7111592_98142a6f-80c3-4a13-a3fb-bec4bd6d515a.jpg?v=1754698988&width=2102)
![[On Sale at 10 PM on August 11th] 0.060ct Loose GIA Emerald from Madagascar, No Oil](http://store.karatz.jp/cdn/shop/files/P7111504_2a68ed93-d0a2-40e9-bf36-967ced39df1c.jpg?v=1754697292&width=2156)
![[Available at 10 PM on August 14th] [Limited to 10 stones] Brazilian Santa Maria Aquamarine Loose Stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010244_bcc49139-ef12-4373-ab57-65a246bbdbeb.jpg?v=1755049700&width=4000)
![[Available from 10/8] [Limited to 7 stones] Brazilian Santa Maria Aquamarine Loose Stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010216_202f7339-09bc-46f1-9dcd-7ec0e44b5b2e.jpg?v=1754619579&width=4000)
![[On sale at 10pm on September 15th] Pakistani Peridot 0.408ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P8083840_cdc67d99-d6ba-48ce-bdbb-e4cd38b8eed5.jpg?v=1757725346&width=3041)
![[On sale at 10pm on September 15th] Pakistani Peridot 0.376ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P8083708_29811ebf-a491-487b-99a6-7bd63725243e.jpg?v=1757725346&width=2550)
[Sold at 10 PM on September 12th] Ethiopian Opal 6.6mm/0.635ct Loose
Sale price¥9,800
[8/8 22:00] Brazilian Aquamarine 0.627ct Loose Stone
Sale price¥6,980
[On Sale at 10 PM on August 7th] Colombian Emerald Rough Stone 6.590ct
Sale price¥15,800
Yellow tourmaline 2.290ct loose
Sale price¥8,800
Australian boulder opal 13.190ct loose
Sale price¥18,800
Paraiba tourmaline from Brazil 0.055ct loose (CuO:1.5%,MnO:3.2%)
Sale price¥39,800
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.