Blue tourmaline from Afghanistan 3.5mm/0.178ct loose
Sale price¥3,980
Yellow tourmaline 0.431ct loose stone
Sale price¥3,980
Andalusite 5mm/0.480ct loose
Sale price¥3,980
![[Available Oct 9, 10 PM] 《Limited Quantity》 Cabochon-cut lab-grown diamond loose stone (1 piece, CVD/2.1-2.3mm) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/PA170394_c8e6e021-ef2a-40d2-91a7-6cd1e7125f1d.jpg?v=1760920748&width=4000)
![[On sale Wednesday, Oct 7 at 6:00 PM] "Hell Teacher Nube" x KARATZ Collaboration - Exclusive Illustrated Random Acrylic Keychain](http://store.karatz.jp/cdn/shop/files/FIX_-11.jpg?v=1760861228&width=4500)
![[On sale Wednesday, 10/7 at 6:00 PM] "Hell Teacher Nube" x KARATZ Collaboration - Exclusive Illustrated Acrylic Stand](http://store.karatz.jp/cdn/shop/files/1_4c6c968c-6db5-458f-a891-e73749c1a17a.jpg?v=1760422214&width=4500)
![[On Sale Wed, Oct 7 at 6:00 PM] "Hell Teacher Nube" x KARATZ Collaboration - Exclusive Illustrated Glitter Can Badge](http://store.karatz.jp/cdn/shop/files/1_24a31620-bd03-4006-98d1-6ef840402ca0.jpg?v=1760421857&width=4500)
![[On sale Wednesday, 10/7 at 6:00 PM] "Hell Teacher Nube" x KARATZ Collaboration - Exclusive Illustrated Clear Postcard Set](http://store.karatz.jp/cdn/shop/files/428aad1349d1b6062359ea69c02bc6d8_6a1b25e9-611b-4c68-9588-eedff19a7429.jpg?v=1760420792&width=4500)
![[On Sale Wed, Oct 7 at 6:00 PM] "Hell Teacher Nube" x KARATZ Collaboration - Exclusive Illustrated Sticker Set](http://store.karatz.jp/cdn/shop/files/16d74c3394e651e16b3426ed000fc68d.jpg?v=1760420285&width=4500)
Brazilian Medusa Quartz (Paraiba Quartz) 1.181ct loose
Sale price¥3,980
Australian boulder opal 0.874ct loose
Sale price¥3,980
Australian boulder opal 1.156ct loose
Sale price¥3,980
Prehnite 3.870ct loose
Sale price¥3,980
Playnight 3.085ct loose
Sale price¥3,980
Prehnite 3.874ct loose
Sale price¥3,980
Fire Opal 2 Stone Pair 4mm/0.336ct Loose
Sale price¥3,980
![[Available until Friday, Nov 13] Anime "Assassination Classroom" x KARATZ Collaboration Clear Card (Complete Set)](http://store.karatz.jp/cdn/shop/files/ansatsu_clearcard_8.png?v=1764653490&width=1080)
![[Sales end 11/13 (Fri)] Anime "Assassination Classroom" x KARATZ Collaboration - Can Badge (Complete Set)](http://store.karatz.jp/cdn/shop/files/ansatsu_canbadge_8.png?v=1764653424&width=1080)
![[Ends 11/13 (Fri)] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Keychain (5 types, random)](http://store.karatz.jp/cdn/shop/files/ansatsu_akukey_7.png?v=1764653396&width=1080)
![[Available until Fri, Nov 13] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Stand (6 types in total)](http://store.karatz.jp/cdn/shop/files/ansatsu_akusuta_7.png?v=1764653453&width=1080)
Prehnite 0.818ct loose stone
Sale price¥3,980
Synthetic Moissanite 0.491ct loose stone
Sale price¥4,980
Montana Sapphire 1.9mm/0.033ct loose
Sale price¥4,980
Andalusite from Sri Lanka 0.408ct loose
Sale price¥3,980
Andalusite from Sri Lanka 0.361ct loose
Sale price¥3,980
Myanmar Purple Spinel 0.312ct Loose Stone
Sale price¥3,980
Green tourmaline 0.305ct loose stone
Sale price¥3,980
Diaspore 0.660ct loose
Sale price¥3,980
Diaspore 0.657ct loose
Sale price¥3,980
Diaspore 0.672ct loose
Sale price¥3,980
Madagascar Apatite 0.371ct Loose Stone
Sale price¥2,980
Spanish Andalusite 4mm/0.204ct loose stone (rose cut)
Sale price¥4,980
![[Limited to 6 stones] Contains 2 stones in total: 1 gemstone (rough stone) that is actually featured in a gemstone encyclopedia + 1 emerald rough stone.](http://store.karatz.jp/cdn/shop/files/collage_5fd345f1-1646-43a1-b347-1e83dd089a63.png?v=1751925957&width=2000)
Garden quartz 8.690ct loose
Sale price¥2,980
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.