![[Sales start at 10:00 PM on Friday, November 21st] Assassination Classroom x KARATZ Collaboration Korosensei 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 start at 10:00 PM on Friday, November 21st] 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 start on Friday, November 21st at 10:00 PM] Assassination Classroom x KARATZ Collaboration Korosensei Five Jewels Figure (Limited to 100 units)](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_1_1080x1080_1be8ed3d-7a10-47a1-9508-85a22ed9b825.jpg?v=1760620266&width=1080)
![[Sales start on Friday, November 21st at 10:00 PM] TV anime "Assassination Classroom" x KARATZ collaboration clear card (complete set)](http://store.karatz.jp/cdn/shop/files/ansatsu_clearcard_8.png?v=1756103824&width=1080)
![[Sales start at 10:00 PM on Friday, November 21st] Assassination Classroom x KARATZ collaboration clear cards (7 random designs)](http://store.karatz.jp/cdn/shop/files/ansatsu_clearcard_1.png?v=1756103824&width=1080)
![[Sales start at 10:00 PM on Friday, November 21st] TV anime "Assassination Classroom" x KARATZ collaboration badges (complete set)](http://store.karatz.jp/cdn/shop/files/ansatsu_canbadge_8.png?v=1756102635&width=1080)
![[Sales start on Friday, November 21st at 10:00 PM] TV anime "Assassination Classroom" x KARATZ collaboration badges (7 random designs)](http://store.karatz.jp/cdn/shop/files/ansatsu_canbadge_1.png?v=1756102635&width=1080)
![[Sales start at 10:00 PM on Friday, November 21st] TV anime "Assassination Classroom" x KARATZ collaboration acrylic keychains (5 random designs)](http://store.karatz.jp/cdn/shop/files/ansatsu_akukey_2.png?v=1756102126&width=1080)
![[Sales start at 10:00 PM on Friday, November 21st] TV anime "Assassination Classroom" x KARATZ collaboration acrylic key chain (1 type)](http://store.karatz.jp/cdn/shop/files/ansatsu_akukey_1.png?v=1756101686&width=1080)
![[Sales start on Friday, November 21st at 10:00 PM] TV anime "Assassination Classroom" x KARATZ collaboration stickers (7 designs)](http://store.karatz.jp/cdn/shop/files/ansatsu_sticker_1.png?v=1756101264&width=1080)
![[Sales start at 10:00 PM on Friday, November 21st] TV anime "Assassination Classroom" x KARATZ collaboration acrylic stands (6 types in total)](http://store.karatz.jp/cdn/shop/files/ansatsu_akusuta_1.png?v=1756093477&width=1080)
Black Star Sapphire 1.410ct loose
Sale price¥14,800
Sphane 4.3mm/0.275ct loose
Sale price¥3,980
Sphene 4.3mm/0.360ct loose
Sale price¥3,980
![[Available at 10 PM on August 23rd] [Limited to 8 stones] Brazilian Rainbow Aquamarine Loose Stone (Pear Shape) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_c2752ed8-4e3e-4837-9ef8-a02a86ef0a25.png?v=1755867372&width=2000)
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.