Birthstone list
Tanzanite from Tanzania 5.8mm/0.803ct loose stone
Sale price¥35,800
Russian Demantoid Garnet (Horsetail certified) 2.4mm/0.063ct loose stone
Sale price¥39,800
Russian Demantoid Garnet (Horsetail certified) 4.6mm/0.464ct loose stone
Sale price¥128,000
Australian black opal 0.404ct loose stone
Sale price¥9,800
Indian Star Garnet 13.090ct Loose Stone (6 Rows)
Sale price¥4,980
Russian demantoid garnet (horsetail recognized) 2mm/0.055ct loose
Sale price¥6,980
Mexican Hyalite Opal 0.873ct Loose
Sale price¥9,800
Mexican Hyalite Opal 0.664ct Loose
Sale price¥6,980
Mexican Hyalite Opal 3.917ct Loose
Sale price¥15,800
Mexican Hyalite Opal 1.554ct Loose
Sale price¥7,980
Mexican Hyalite Opal 1.687ct Loose
Sale price¥9,800
Brazilian Rubellite 2.439ct loose stone
Sale price¥69,800
Tanzanite 1.540ct loose stone
Sale price¥49,800
Tanzanite 1.055ct loose stone
Sale price¥29,800
Tanzanite 1.458ct loose stone
Sale price¥39,800
Mozambique pink tourmaline 1.006ct loose stone
Sale price¥8,800
Mexican Fire Opal 3.160ct Loose
Sale price¥29,800
Mexican Fire Opal (Faceted Cut) 0.934ct Loose
Sale price¥25,800
Montana Sapphire 4mm/0.330ct Loose (Yellow Sapphire)
Sale price¥7,980
Mozambique Rhodolite Garnet 1.146ct Loose Stone
Sale price¥12,800
Ruby 0.258ct loose
Sale price¥18,800
Pyrope Almandine Garnet 2.514ct Loose Stone
Sale price¥29,800
Kasharai Amethyst 0.430ct Loose
Sale price¥12,800
Australian black opal 0.544ct loose stone
Sale price¥18,800
Brazilian Sky Blue Topaz (untreated) 2.560ct loose stone
Sale price¥12,800
Tanzania Peristerite 0.911ct Loose Stone (Royal Blue Moonstone)
Sale price¥15,800
Sri Lankan Yellow Sapphire 0.350ct Loose
Sale price¥12,800
Sri Lankan Yellow Sapphire 0.474ct Loose
Sale price¥15,800
Brazilian unheated pink imperial topaz (sherry pink) 0.931ct loose stone
Sale price¥98,000
Brazilian unheated pink imperial topaz (sherry pink) 0.254ct loose stone
Sale price¥14,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.794ct Loose Stone
Sale price¥15,800
Sri Lankan bicolor sapphire 0.484ct loose stone
Sale price¥12,800
Dominican Republic Conch Pearl 1.990ct Loose (with flame pattern)
Sale price¥29,800
Amazon Green Opal 7mm/0.88ct Loose
Sale price¥7,980
Paraiba tourmaline from Brazil 0.217ct loose (CuO:1.5%, MnO:0.5%)
Sale price¥39,800
Colombian emerald 10.940ct rough stone
Sale price¥69,800
Madagascar Bicolor Sapphire 0.626ct Loose
Sale price¥29,800
Colombian mica in emerald 1.940ct loose
Sale price¥49,800
Ethiopian Opal 1.521ct Loose
Sale price¥3,980
Ethiopian Opal 1.014ct Loose
Sale price¥3,980
Brazilian cat's eye emerald 4.070ct loose stone
Sale price¥198,000
Burmese Ruby 3.725ct Loose GIA & Chuho
Sale price¥198,000
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.