![[Sales Start November 2nd at 10 PM] Win an 8.16ct Sky Blue Topaz from Koshu Kiriko (Sakura Kiriko) and more in the November Birthstone Topaz Lottery! 💎 {Multiple Purchase Discounts Available}](http://store.karatz.jp/cdn/shop/files/collage_683e1d28-a7c3-4109-868d-479fec634702.png?v=1762054840&width=2250)
![[On sale November 3rd at 10pm] Win two unheated royal blue sapphires (with AIGS certificate) in the Blue Sapphire Lottery (Multiple purchase discounts available)](http://store.karatz.jp/cdn/shop/files/1_96affec0-626e-4648-9cd4-8b45e4e0d80c.png?v=1762040852&width=4000)
![[On sale 10/31 at 10 PM] Limited to 10 stones: 0.20ct Yellow Diamond Loose Stone, Including Fancy Colors [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_64543983-1aef-497a-b59d-22c8da336a98.png?v=1761804115&width=2250)
![[On sale 10/31 at 10 PM] Garnet Gacha Loose Stone Set with Two Koshu Cut Precious Stones (Multiple Purchase Discounts Available)](http://store.karatz.jp/cdn/shop/files/2ce9f9727de9532a55237668af9f2b6d_e4813415-0cbb-4832-91b8-0cb2c6b767c8.png?v=1761375345&width=2000)
![Limited to 3 stones: One loose Brazilian Elestial Amethyst (3.5-3.9mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_a4907829-a1ef-40d2-ae34-572edef35c78.png?v=1756866168&width=2000)
![Limited to 8 stones: One loose Brazilian rainbow aquamarine (average 0.9 carat, pear cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_9316de3e-a74f-47cf-b228-cb256a0050fc.png?v=1756458978&width=2000)
Sphane 4.3mm/0.275ct loose
Sale price¥3,980
Sphene 4.3mm/0.360ct loose
Sale price¥3,980
![Limited to 9 stones: One loose Brazilian rainbow aquamarine (oval cut, average 0.8 carats) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_60dc3c4e-56f7-4fd7-a18c-f0d43b2fb29e.png?v=1754965065&width=2000)
![[Sales start on Friday, August 8th at 22:00] TV anime "Date A Live V" x KARATZ collaboration foil-stamped glitter can badges](http://store.karatz.jp/cdn/shop/files/1_5a75b2c0-74f1-4382-ab20-f2df8b91fb77.png?v=1753776085&width=1080)
![[Sales start on Friday, August 8th at 22:00] TV anime "Date A Live V" x KARATZ collaboration foil-stamped glitter can badges](http://store.karatz.jp/cdn/shop/files/1_110c1f46-fe62-4d98-b010-3afc05a4bbb1.png?v=1753775636&width=1080)
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.