Colombian mint-colored emerald 0.214ct loose stone
Sale price¥8,800
Zambian emerald 0.159ct loose stone
Sale price¥8,800
Zambian emerald 0.135ct loose stone
Sale price¥8,800
Brazilian pink tourmaline 0.234ct loose stone
Sale price¥8,800
Congo Pink Tourmaline 6.0mm/0.825ct Loose Stone
Sale price¥29,800
Congo Pink Tourmaline 5.9mm/0.798ct Loose Stone
Sale price¥25,800
Congo Pink Tourmaline 5.0mm/0.463ct Loose Stone
Sale price¥24,800
Brazilian mint color tourmaline 0.145ct loose stone
Sale price¥8,800
Brazilian green tourmaline 0.194ct loose stone
Sale price¥12,800
Brazilian green tourmaline 0.755ct loose stone
Sale price¥18,800
Illusion Tourmaline (Iridescent Tourmaline) 1.356ct Loose Stone
Sale price¥39,800
Brazilian Dumortierite in Quartz 1.911ct Loose Stone
Sale price¥8,800
Brazilian Dumortierite in Quartz 1.451ct Loose Stone
Sale price¥8,800
Brazilian Dumortierite in Quartz 0.978ct Loose Stone
Sale price¥12,800
Mozambique pink sapphire 0.169ct loose stone
Sale price¥6,980
0.145ct loose pink sapphire from Madagascar
Sale price¥6,980
Blue sapphire 0.295ct loose stone
Sale price¥7,980
0.333ct loose sapphire
Sale price¥8,800
0.266ct loose blue sapphire from Madagascar
Sale price¥8,800
0.170ct loose blue sapphire from Madagascar
Sale price¥8,800
Brazilian Morganite 1.266ct loose stone
Sale price¥29,800
Brazilian Bicolor Imperial Topaz 0.981ct Loose Stone
Sale price¥79,800
Namibian Jeremejevite 0.245ct loose stone
Sale price¥79,800
Brazilian mint-colored emerald 0.945ct loose stone
Sale price¥25,800
![[Sales end on Thursday, August 20] 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)
![[Sales End on Thursday, August 20] Assassination Classroom x KARATZ Collaboration - Koro-sensei Model Bracelet](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_5_1080x1080_a307a391-2381-4edd-a09a-3a2caaa72c1d.jpg?v=1760620220&width=1080)
![[Sales end on Thursday, August 20] "Assassination Classroom" x KARATZ Collaboration - Korosensei 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 on Thursday, Aug 20] [Only 2 remaining] Anime "Assassination Classroom" x KARATZ Collaboration Koro Sensei Five Great Gems Figure [Limited 100 pieces]](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_1_1080x1080_1be8ed3d-7a10-47a1-9508-85a22ed9b825.jpg?v=1760620266&width=1080)
Bicolor sapphire 0.856ct loose
Sale price¥18,800
Russian demantoid garnet (horsetail recognized) 5.2mm/0.633ct loose
Sale price¥198,000
YAG (yttrium aluminum garnet) 1.870ct loose
Sale price¥9,800
YAG (yttrium aluminum garnet) 7.5mm/2.410ct loose
Sale price¥12,800
YAG (yttrium aluminum garnet) 7.3mm./2.150ct loose
Sale price¥12,800
Color change Andesine 1.90ct loose
Sale price¥29,800
Color change Andesine 1.67ct loose
Sale price¥25,800
Tanzanite 41.690ct loose
Sale price¥2,480,000
Brazilian Pink Imperial Topaz 2.794ct Loose Japanese-German Edition
Sale price¥128,000
![[Sales End 8/20 (Thu)] 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 on 8/20 (Thu)] "Assassination Classroom" x KARATZ Collaboration Can Badge (Complete Set)](http://store.karatz.jp/cdn/shop/files/ansatsu_canbadge_8.png?v=1764653424&width=1080)
![[Sales end on Thursday, August 20] "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)
![[Sales End on Thursday, August 20] Anime Assassination Classroom x KARATZ Collaboration Acrylic Keychain (1 type)](http://store.karatz.jp/cdn/shop/files/ansatsu_akukey_1.png?v=1756101686&width=1080)
![[Sales end on 8/20 (Thu)] "Assassination Classroom" x KARATZ Collaboration Stickers (7 designs)](http://store.karatz.jp/cdn/shop/files/ansatsu_sticker_8.png?v=1764653463&width=1080)
Pink tourmaline cat's eye 3.800ct loose
Sale price¥8,800
Goethite in quartz 1.020ct 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.