Birthstone list
South African yellow diamond (makeable) 0.159ct rough stone
Sale price¥12,800
Bekily Blue Garnet from Madagascar (color change garnet) 0.297ct loose
Sale price¥19,800
Opal 6mm/0.590ct loose (rose cut)
Sale price¥5,980
Kazakhstan Golden Hill Turquoise 2.314ct Loose Stone
Sale price¥7,980
Canadian rough diamond (sawable) 0.096ct rough with trigon
Sale price¥29,800
Unheated silky pink sapphire from Vietnam 0.202ct loose
Sale price¥6,980
Benitoite 0.091ct loose (emerald cut)
Sale price¥25,800
Rubellite 7.068ct loose Japanese-German book
Sale price¥498,000
Brazilian unheated particolor Paraiba tourmaline 0.84ct loose GIA
Sale price¥2,580,000
Silky diamond 2.7mm/0.086ct loose
Sale price¥9,800
Silky diamond 2.8mm/0.097ct loose
Sale price¥9,800
Ubaite/dravite tourmaline 3.157ct rough stone
Sale price¥6,980
Mexican cantera opal 17.528ct loose
Sale price¥29,800
Madagascar Purple Sapphire 4.2mm/0.418ct Loose
Sale price¥19,800
Unheated Vietnamese Silky Pink Sapphire 0.291ct Loose Stone
Sale price¥12,800
Blue Sapphire 5.0mm/0.552ct Loose Stone
Sale price¥18,800
USA origin Peridot, 0.496 ct, 2-stone matched pair, loose
Sale price¥12,800
American Peridot 0.969ct Loose Stone
Sale price¥25,800
Tanzanian Mandarin Garnet 0.352ct Loose Stone
Sale price¥18,800
Mexican Fire Opal 0.191ct Loose (Faceted Cut)
Sale price¥12,800
0.939 ct Loose Imperial Topaz from Brazil with Certificate
Sale price¥29,800
Uncut Canadian diamond (sawable) 0.103ct
Sale price¥29,800
Bicolor Benitoite 0.130ct loose (emerald cut)
Sale price¥65,800
Paraiba tourmaline from Brazil 0.132ct loose (CuO:2.1%.MnO:2.2%)
Sale price¥188,000
South African yellow diamond (makeable) 0.202ct rough stone
Sale price¥15,800
South African gray diamond (makeable) 0.169ct rough stone
Sale price¥14,800
Tanzanite from Tanzania 0.467ct loose stone
Sale price¥9,800
Tanzanite from Tanzania 0.436ct loose stone
Sale price¥8,800
Tanzanian Bicolor Grossular Garnet 2.997ct Loose Stone
Sale price¥69,800
0.257ct Unheated Silky Pink Sapphire from Vietnam
Sale price¥12,800
Sri Lankan Bicolor Sapphire 0.607ct Loose Stone
Sale price¥15,800
Brazilian green tourmaline 1.233 ct loose stone
Sale price¥69,800
Tanzanite from Tanzania 0.730ct loose stone
Sale price¥29,800
Brazilian Santa Maria Aquamarine 0.524ct Loose Stone
Sale price¥55,800
Kenyan Tsavorite 1.026ct Loose Stone
Sale price¥98,000
American Peridot 0.770ct Loose Stone
Sale price¥12,800
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 0.243ct loose
Sale price¥14,800
Paraiba tourmaline from Mozambique 0.270ct loose
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.
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.