![Limited to 10 stones: Tanzanite rough stone gacha including bicolor pink tanzanite rough stones (average 4.2 carats) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_5799e77a-97c8-4d6c-b77b-dec5271cc0a0.png?v=1762053625&width=2250)
![[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration - Irina Jelavic Model Ring](http://store.karatz.jp/cdn/shop/files/ansatsu2_bnrB_5_1080x1080_43830397-3927-489b-8774-fb32721de233.jpg?v=1771996031&width=1080)
![[Sales end on Tuesday, May 5] TV Anime "2.5 Dimensional Seduction" x KARATZ Jewelry Store Collaboration Clear Poster](http://store.karatz.jp/cdn/shop/files/OEM-20260120-A3CP-01_04.jpg?v=1770346301&width=800)
![[On Sale April 18th, 10 PM JST] [Limited 9 Stones] Tosa Blood Coral Branch (Raw Coral) 1 Stone (March Birthstone, Coral, Average 7ct) [Bulk Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/P1010020_2e43750c-2330-442e-bec8-19480c9aafad.jpg?v=1776333256&width=4000)
![[On sale May 3rd at 10 PM] Limited to 9 stones! Color-shifting amethyst gacha, including a 3.49ct konpeito cut by Makoto Nakano (normally 22,800 yen) and a Sanje-cut stone. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/16_96dab937-7bec-4aeb-8c3a-dbd3ada3274e.png?v=1776320385&width=1890)
![[Limited to 6 stones] [Mr. Sanjay] Mexican opal or Sri Lankan spinel 1 loose stone (with defects) [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_555b8b37-ff10-4ed1-a662-dd56cbebe95a.jpg?v=1708594237&width=4000)
![[Sales end on Friday, April 18th] TV anime "I'd Rather Be Someone Else in the Next Life" x KARATZ collaboration Miyama Kirishima model launched](http://store.karatz.jp/cdn/shop/files/1__1080x1080_3d960cc3-c9a5-4828-b367-58cc860b0746.png?v=1738627898&width=4500)
![[Final Orders Accepted - On Sale November 21st (Fri) at 10 PM] {Limited to 30} "PSYCHO-PASS: PROVIDENCE" x KARATZ Collaboration Pure Platinum (PT999) Coin](http://store.karatz.jp/cdn/shop/files/da05213790112f80db25136f28d88f54_25aa325c-77c2-4237-8d0a-57b52ffb00ee.jpg?v=1754458456&width=4500)
![[Limited to 8 stones] Jam Gacha💎 1 Rainbow Garnet stone (January birthstone) from Tenkawa Village, Nara Prefecture [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/2025-05-158.54.00.png?v=1747266901&width=1279)
![[On sale from 10pm on Tuesday, June 24th] TV anime "Tokyo Ghoul" x KARATZ collaboration Kaneki - Rinkaku image ring & pendant top](http://store.karatz.jp/cdn/shop/files/1080x1080px_98c232d5-2921-4850-b446-5910abe8087b.jpg?v=1749301505&width=2250)
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.