Birthstone list
![[Sale at 10:00 PM on October 13th] [Sakura In-Cut] Sri Lanka Ratnapura Sapphire 6.0mm/0.839ct Loose](http://store.karatz.jp/cdn/shop/files/collage_7ab487c3-3173-4149-b4c1-85a3f2bef3bb.png?v=1760166578&width=2250)
18K Yellow Gold Colombian Emerald 3.0mm/0.062ct Diamond Ring
Sale price¥79,800
[12552511] Pink diamond 0.296ct loose stone
Sale price¥188,000
[Posted 12548173] Colombian oil-free emerald 0.060ct loose
Sale price¥89,800
Unheated Brazilian Paraiba tourmaline 0.108ct loose
Sale price¥128,000
![[Posted in 32501467] Brown Diamond (Treatment) 0.169ct Loose (FANCY RED BROWN, VS2)](http://store.karatz.jp/cdn/shop/files/P5237584_7e2fd310-2752-4f89-8099-bbc30cf74b00.jpg?v=1760831984&width=4000)
Unheated Brazilian Color Change Paraiba Tourmaline 0.30ct Loose GIA
Sale price¥1,280,000
YAG (Yttrium Aluminum Garnet) 6.5mm/1.548ct loose stone
Sale price¥12,800
Bicolor sapphire 0.292ct loose
Sale price¥22,800
Brazilian Paraiba tourmaline 0.065ct loose (CuO:2.0%, MnO:2.6%)
Sale price¥22,800
Yellow diamond 2.6mm loose (equivalent to VS class)
Sale price¥12,800
Black Star Sapphire 1.410ct loose
Sale price¥14,800
【11/3 22時販売】ミャンマー産バイカラースターサファイア 0.640ctルース
Sale price¥45,800
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.