![[On sale May 10th at 10 PM] "Limited to 3 stones" Brazilian Paraiba Tourmaline (Cabochon Cut approx. 3.0mm) 1 Stone Loose Gemstone "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/P5070786_ec0bd736-18d0-4597-8cdf-d783daa25e3b.jpg?v=1778246718&width=3109)
![[On Sale June 8th, 10 PM JST] India, Orissa Origin Alexandrite 0.715ct Loose Stone with Certification](http://store.karatz.jp/cdn/shop/files/collage_8ee98efe-30a4-4a2c-8f62-7d2046cf734b.png?v=1780789514&width=3000)
![[On sale June 8th, 10 PM] India, Orissa Origin Alexandrite 0.760ct Loose Stone with Certification](http://store.karatz.jp/cdn/shop/files/collage_7ec1d4e9-6f93-4498-a556-50e6e875f347.png?v=1780789316&width=3000)
[On sale June 8th, 10 PM] Bi-Color Sapphire 1.040 ct Loose Gemstone GIT
Sale price¥29,800
South African diamond rough (sawable) 0.110ct rough
Sale price¥22,800
South African diamond rough (sawable) 0.085ct rough
Sale price¥15,800
Brazilian pink tourmaline 0.968ct loose stone
Sale price¥18,800
Sri Lankan Star Sapphire 1.682ct Loose
Sale price¥12,800
Sri Lankan Star Sapphire 1.339ct Loose
Sale price¥12,800
Sri Lankan Star Sapphire 1.225ct Loose
Sale price¥12,800
Bicolor Zoisite 1.100ct Loose Stone (Bicolor Tanzanite)
Sale price¥18,800
Lavender Tanzanite 0.784ct loose stone
Sale price¥12,800
Spessartite Garnet from Madagascar 1.053ct loose stone
Sale price¥29,800
Russian rough diamond (sawable) 0.117ct loose
Sale price¥29,800
![[Sales End on Thursday, October 31st] "Given the Movie: Hiiragi Mix" x KARATZ Collaboration Jewelry Sato Mafuyu Model](http://store.karatz.jp/cdn/shop/files/20240311142203.jpg?v=1738627863&width=1200)
![[Sakura Shape Jewelry] Hanaboshi (double hanging necklace)](http://store.karatz.jp/cdn/shop/files/PA084213.jpg?v=1738627916&width=4000)
![[Sales end on Sunday, May 10] Assassination Classroom x KARATZ Collaboration - Koro-sensei Model Ring](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_2_1080x1080_5a04ae14-e1e5-4855-aaff-92dce1dc2205.jpg?v=1760620220&width=1080)
![[Sales End May 5 (Tue)] TV Anime "2.5 Dimensional Seduction" x Jewelry Store KARATZ Collaboration Ring](http://store.karatz.jp/cdn/shop/files/2point5d_bnrB1_a_1080x1080_1.jpg?v=1770889973&width=1080)
![[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)
![[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration Koro-sensei Model Pendant Top](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_3_1080x1080_fc821a2d-a1bd-4f69-bb76-e633fd9eb219.jpg?v=1760620244&width=1080)
![[Sales end May 10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Koro-sensei Model Earring (Single)](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_6_1080x1080_acf42c5b-8c28-4dd3-9221-8a31ee35ad32.jpg?v=1760620169&width=1080)
![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)
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.