Birthstone list
Brazilian bicolor tourmaline 0.545ct loose stone (rose cut)
Sale price¥5,980
Brazilian bicolor tourmaline 0.549ct loose stone (rose cut)
Sale price¥8,800
South African diamond rough (sawable) 0.112ct rough
Sale price¥44,800
South African diamond rough (sawable) 0.091ct rough (trigon)
Sale price¥35,800
[Sakura Incut] Brazilian Blue Topaz 16mm/15.329ct Loose Patch
Sale price¥39,800
Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.126ct Loose Stone
Sale price¥12,800
Bekily Blue Garnet from Madagascar (color change garnet) 0.119ct loose
Sale price¥12,800
Bekily Blue Garnet from Madagascar (color change garnet) 0.149ct loose
Sale price¥14,800
Sri Lankan Star Sapphire 1.237ct Loose
Sale price¥15,800
Brazilian Indigolite Tourmaline in Quartz 1.873ct Loose Stone
Sale price¥12,800
Colombian pyrite in emerald 15.291ct loose
Sale price¥1,000,000
Brazilian Paraiba Tourmaline in Quartz 1.171ct Loose Stone
Sale price¥18,800
Brazilian Paraiba Tourmaline in Quartz 1.674ct loose stone
Sale price¥19,800
Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.824ct Loose Stone
Sale price¥39,800
Brazilian copper rutilated quartz 6.8mm/1.206ct loose stone
Sale price¥8,800
YAG (Yttrium Aluminum Garnet) 4.5mm/0.440ct loose stone
Sale price¥8,800
YAG (Yttrium Aluminum Garnet) 4.8mm/0.538ct loose stone
Sale price¥8,800
YAG (Yttrium Aluminum Garnet) 4.1mm/0.322ct loose stone
Sale price¥8,800
Sri Lankan Yellow Sapphire 0.282ct Loose
Sale price¥12,800
Sri Lankan Yellow Sapphire 0.826ct Loose
Sale price¥25,800
Tanzania Peristallite 6.0mm/0.531ct Loose Stone (Blue Moonstone)
Sale price¥9,800
Tanzania Peristerite 1.592ct Loose Stone (Blue Moonstone)
Sale price¥14,800
Brazilian pink tourmaline 1.018ct loose stone
Sale price¥29,800
Yellow Diamond (Cabochon Cut) 0.185ct Loose
Sale price¥25,800
Brown diamond (sugarloaf cut) 0.278ct loose (SI class equivalent)
Sale price¥45,800
Brazilian Paraiba Tourmaline in Quartz 0.556ct Loose Stone
Sale price¥15,800
K18YG Afghan Kunzite 0.74ct, Tanzanite, Sapphire Ring
Sale price¥79,800
Colombian emerald rough stone 37.764ct (Gachala mine)
Sale price¥598,000
Brazilian bicolor tourmaline 0.502ct loose stone
Sale price¥9,800
Brazilian Limonite in Topaz 20.777ct loose stone
Sale price¥39,800
Russian diamond rough (sawable) 0.618ct rough (trigon)
Sale price¥228,000
Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting)
Sale price¥79,800
Myanmar spinel and Brazilian amethyst 7 stone set ring (Alterno setting)
Sale price¥79,800
![[On sale from 10pm on 12/29] Sri Lankan blue sapphire and 10 Vietnamese silky pink sapphires in a half eternity ring set (approx. 2.6mm)](http://store.karatz.jp/cdn/shop/files/P1010116_672b9da8-e8b2-4ece-bf77-5820dff2b5f9.jpg?v=1735111884&width=4000)
13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm)
Sale price¥158,000
Russian Demantoid Garnet (Horsetail) 3.5mm/0.187ct Loose Stone
Sale price¥45,800
Russian Demantoid Garnet (Horsetail certified) 2.4mm/0.066ct loose stone
Sale price¥12,800
Brazilian Pink Tourmaline 0.331ct Loose Stone
Sale price¥8,800
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.