Custom Cut
Indian Moss Agate 0.721ct Loose Stone
Sale price¥8,800
Indian Moss Agate 0.873ct Loose Stone
Sale price¥7,980
Tanzania Bicolor Zoisite 0.147ct Loose Stone
Sale price¥3,980
Tanzania Bicolor Zoisite 3.7mm/0.228ct Loose Stone
Sale price¥5,980
Sillimanite from Sri Lanka 0.183ct loose stone
Sale price¥6,980
Sri Lankan sapphire 0.211ct loose stone
Sale price¥8,800
Zambian emerald 0.099ct loose stone
Sale price¥9,800
Sri Lankan Yellow Sapphire 0.324ct Loose
Sale price¥9,800
Sri Lankan Yellow Sapphire 0.124ct Loose
Sale price¥4,980
Sri Lankan Yellow Sapphire 0.189ct Loose
Sale price¥5,980
Sri Lankan Yellow Sapphire 0.392ct Loose
Sale price¥9,800
Mozambique Almandine Garnet 0.913ct Loose Stone
Sale price¥9,800
Mozambique Almandine Garnet 1.229ct Loose Stone
Sale price¥12,800
Mozambique Almandine Garnet 1.602ct Loose Stone
Sale price¥15,800
Mozambique Almandine Garnet 1.465ct Loose Stone
Sale price¥15,800
Mozambique Almandine Garnet 1.052ct Loose Stone
Sale price¥12,800
Mozambique Almandine Garnet 1.065ct Loose Stone
Sale price¥11,000
Tanzanian Rhodolite Garnet 1.329ct Loose Stone
Sale price¥15,800
Mexican Fire Opal 0.343ct Loose
Sale price¥15,800
Colombian Euclase 2.276ct loose stone
Sale price¥69,800
Colombian Euclase 1.157ct loose stone
Sale price¥69,800
Colombian Euclase 0.315ct loose stone
Sale price¥39,800
Sillimanite from Sri Lanka 0.372ct loose stone
Sale price¥7,980
Sillimanite from Sri Lanka 0.409ct loose stone
Sale price¥7,980
Sillimanite from Sri Lanka 0.376ct loose stone
Sale price¥9,800
Nigerian Spessartine Garnet 0.559ct Loose Stone
Sale price¥7,980
Thai Blue Sapphire 0.388ct Loose
Sale price¥9,800
Thai Blue Sapphire 0.740ct Loose
Sale price¥15,800
Alexandrite 0.201ct loose stone
Sale price¥39,800
Tanzanian Rhodolite Garnet 0.794ct Loose Stone
Sale price¥9,800
Brazilian Dendritic Agate 3.079ct Loose Stone
Sale price¥8,800
Brazilian Green Tourmaline 0.549ct Loose Stone
Sale price¥9,800
Brazilian Green Tourmaline 0.457ct Loose Stone
Sale price¥15,800
Brazilian Tourmaline 0.671ct Loose Stone
Sale price¥9,800
Brazilian Tourmaline 0.615ct Loose Stone
Sale price¥9,800
Brazilian Dumortierite in Quartz 1.529ct loose stone
Sale price¥18,800
Brazilian Dumortierite in Quartz 2.116ct loose stone
Sale price¥18,800
Tanzanite from Tanzania 0.609ct loose stone
Sale price¥15,800
Madagascar White Sapphire 0.490ct Loose JTL
Sale price¥12,800
Quartz 15.493ct loose patch
Sale price¥9,800
Oregon Sunstone from the United States 8.8mm/1.603ct loose stone
Sale price¥14,800
Tanzania Peristallite 6.0mm/0.531ct Loose Stone (Blue Moonstone)
Sale price¥9,800
Tanzania Peristerite 6.2mm/0.582ct loose stone
Sale price¥6,980
Tanzania Peristerite 1.592ct Loose Stone (Blue Moonstone)
Sale price¥14,800
Brown diamond (sugarloaf cut) 0.278ct loose (SI class equivalent)
Sale price¥45,800
Brazilian bicolor tourmaline 0.502ct loose stone
Sale price¥9,800
Synthetic Moissanite 10mm/4.342ct Loose Stone
Sale price¥18,800
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.
業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。
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.