Birthstone list
Australian black opal 0.758ct loose stone
Sale price¥18,800
3.583ct Australian Black Opal Loose Stone (Double Sided)
Sale price¥29,800
Tanzanite from Tanzania 0.680ct loose stone
Sale price¥15,800
Sri Lankan bicolor sapphire 0.586ct loose stone
Sale price¥39,800
Demantoid garnet 15.468ct rough stone from Madagascar
Sale price¥9,800
Paraiba tourmaline from Brazil 3.5mm/0.278ct loose
Sale price¥29,800
Paraiba tourmaline from Mozambique 0.516ct loose
Sale price¥39,800
Paraiba tourmaline from Mozambique 0.270ct loose
Sale price¥18,800
Mexican Water Opal 2.623ct Loose (Contralus Opal)
Sale price¥39,800
Mexican Water Opal 1.790ct Loose (Contralus Opal)
Sale price¥29,800
Diamond rough (makeable) 0.204ct rough
Sale price¥39,800
0.604ct rough diamond
Sale price¥12,800
Brazilian green tourmaline 4.345ct loose stone
Sale price¥69,800
Tanzanite from Tanzania 2.777ct loose stone
Sale price¥98,000
Brazilian Blue Tourmaline 0.827ct Loose Stone
Sale price¥19,800
Sri Lankan triple star sapphire 1.743ct loose stone
Sale price¥128,000
Colombian emerald 0.091ct loose stone
Sale price¥15,800
Mexican Water Opal (Faceted) 0.215ct Loose (Contrarus Opal)
Sale price¥18,800
Colombian Emerald 3.3mm/0.131ct Loose
Sale price¥25,800
Parasitic Peridot 0.241ct Loose Stone, Japan-Germany Scale
Sale price¥98,000
Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.189ct Loose Stone
Sale price¥18,800
Madagascar Bekily Blue Garnet (Color Change Garnet) 0.221ct Loose Stone
Sale price¥22,800
Mint green sapphire 0.348ct loose
Sale price¥9,800
Mint color tourmaline 0.198ct loose
Sale price¥4,980
Mint color tourmaline 0.229ct loose
Sale price¥4,980
Pink tourmaline 0.205ct loose
Sale price¥4,980
Bicolor sapphire from Madagascar 0.265ct loose
Sale price¥16,800
Unheated silky pink sapphire from Vietnam 0.247ct loose
Sale price¥8,800
Mexican Water Opal (Faceted) 0.402ct Loose (Contrarus Opal)
Sale price¥12,800
![[12/7 22:00 Sale] Mexican Egg-in Opal 0.381ct Loose](http://store.karatz.jp/cdn/shop/files/PC053061_853dfbb9-2bb5-4b4f-abbd-aef4b76d3dd5.jpg?v=1766553969&width=4000)
[12/7 22:00 Sale] Mexican Egg-in Opal 0.381ct Loose
Sale price¥18,800
Tanzanian Chrome Tourmaline 0.164ct Loose Stone
Sale price¥9,800
![[12/7 22:00] Brazilian Rubellite 0.332ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PC052669.jpg?v=1765587579&width=4000)
[12/7 22:00] Brazilian Rubellite 0.332ct Loose Stone
Sale price¥12,800
![[12/7 22:00] American Peridot 0.385ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PC052641_37df0278-4a00-4c48-9087-8187fb202890.jpg?v=1765587659&width=4000)
[12/7 22:00] American Peridot 0.385ct Loose Stone
Sale price¥8,800
Sri Lankan Yellow Sapphire 0.343ct Loose
Sale price¥12,800
![[12/10 22:00 Sale] Indian Moonstone 6.1mm/0.878ct Loose Stone (Rose Cut)](http://store.karatz.jp/cdn/shop/files/PC032133_305a91c4-6921-466f-b86b-6196b85216e3.jpg?v=1765630124&width=4000)
Brazilian green tourmaline 0.821ct loose stone
Sale price¥12,800
Mexican cantera opal 15.542ct loose
Sale price¥15,800
Mexican cantera opal 9.422ct loose
Sale price¥25,800
Mexican cantera opal 7.563ct loose
Sale price¥15,800
Australian boulder opal 6.980ct loose
Sale price¥6,980
1.689ct loose teal blue sapphire
Sale price¥98,000
Sri Lankan star sapphire 12.679ct loose
Sale price¥158,000
Brazilian green tourmaline 3.102ct loose stone
Sale price¥69,800
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.