![[Sales begin June 12 at 10 PM JST] Blue Gem Gacha 💎 Featuring Brazilian Paraiba Tourmaline (CuO: 1.5%, MnO: 3.2%) normally priced at 35,800 JPY, Zimbabwean Euclase, and more! 《Bulk purchase discounts available》](http://store.karatz.jp/cdn/shop/files/32.png?v=1779063779&width=4000)
![[Selling June 6th at 10 PM] 《Limited to 3 stones》Natural pink diamonds, including fancy colors, regularly ¥59,800 《Multiple purchase discount available》](http://store.karatz.jp/cdn/shop/files/2026-06-0412.23.02.png?v=1780543439&width=1268)
![Limited to 6 stones: One loose, oil-free emerald from Russia (3.2mm, round cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010821_c88ac283-022d-4a22-ac64-b6108721720c.jpg?v=1760316089&width=3553)
![Limited Edition of 7 Montana Sapphires (Rock Creek Mine) Gacha (Pear Shape, Approx. 5 x 3mm) [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/PC160141.jpg?v=1766185869&width=4000)
![[On sale 5/23 at 10 PM] Limited to 5 stones: Burmese Ice Jadeite (approx. 3.3-3.8mm) - Multiple purchase discount available](http://store.karatz.jp/cdn/shop/files/P5150084.jpg?v=1778975404&width=4000)
![[On sale June 6th at 10 PM] Limited to 2 stones: 1 Sri Lankan Dunilite, all stones include a gemological report. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/P1010082_3f95d8ac-2083-42f0-9ee9-e8417efc5044.jpg?v=1780544836&width=3420)
![[On sale June 7th at 10 PM] Limited to 1 set: 6-stone Benitoite Gradient Set, including Orange Benitoite (Peach Benitoite) (2.25mm, includes top quality) [Multiple Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/P3030003_0ef72a27-a332-4d89-94a2-87d25d73c2e6.jpg?v=1772530085&width=1262)
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.