Birthstone list
Tanzanite from Tanzania 0.432ct loose stone
Sale price¥12,800
Brazilian Aquamarine 0.474ct Loose Stone
Sale price¥12,800
Vietnam Aquamarine 0.586ct Loose
Sale price¥12,800
Brazilian bicolor topaz 2.618ct loose stone (untreated)
Sale price¥18,800
Brazilian Green Tourmaline 0.561ct Loose Stone
Sale price¥25,800
Brazilian Green Tourmaline 1.431ct Loose Stone
Sale price¥12,800
Sri Lankan bicolor sapphire 1.020ct loose stone
Sale price¥59,800
Brazilian Green Tourmaline 4.613ct Loose Stone
Sale price¥39,800
Colombian emerald 0.203ct loose stone with certificate
Sale price¥98,000
Russian demantoid garnet (horsetail recognized) 0.291ct loose
Sale price¥69,800
Ethiopian Opal 7.2mm/0.910ct Loose Stone
Sale price¥6,980
Tanzanian bicolor tanzanite 1.284ct loose stone
Sale price¥29,800
Sri Lankan Cat's Eye Sapphire 2.177ct Loose
Sale price¥98,000
Madagascar Purple Sapphire 4.5mm/0.393ct Loose Stone
Sale price¥18,800
Madagascar Purple Sapphire 4.5mm/0.435ct Loose Stone
Sale price¥18,800
Brazilian Santa Maria Aquamarine 0.968ct loose stone
Sale price¥69,800
Dendritic Opal 3.041ct Loose
Sale price¥18,800
Tanzanite from Tanzania 5.8mm/0.803ct loose stone
Sale price¥35,800
Russian Demantoid Garnet (Horsetail certified) 4.6mm/0.464ct loose stone
Sale price¥128,000
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 1.055ct 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 (Faceted Cut) 0.934ct Loose
Sale price¥25,800
Mozambique Rhodolite Garnet 1.146ct Loose Stone
Sale price¥12,800
Pyrope Almandine Garnet 2.514ct Loose Stone
Sale price¥29,800
Australian black opal 0.544ct loose stone
Sale price¥18,800
Brazilian Sky Blue Topaz (untreated) 2.560ct loose stone
Sale price¥12,800
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
Madagascar Bicolor Sapphire 0.626ct Loose
Sale price¥29,800
Colombian mica in emerald 1.940ct loose
Sale price¥49,800
[Takeshi Yamamoto] Brazilian Ametrine 29.930ct loose stone
Sale price¥79,800
South African diamond rough stone 0.330ct
Sale price¥5,980
Sri Lankan Blue Sapphire 4.2mm/0.333ct Loose Stone
Sale price¥12,800
Mozambique Almandine Garnet 0.774ct Loose Stone
Sale price¥8,800
Mozambique Almandine Garnet 0.477ct Loose Stone
Sale price¥8,800
Mozambique Rhodolite Garnet 5.7mm/1.188ct Loose Stone
Sale price¥12,800
Mexican Cantera Opal 14.458ct loose stone (faceted cut)
Sale price¥14,800
Synthetic Opal 2.026ct Loose
Sale price¥19,800
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.