Birthstone list
Uncut Canadian diamond (sawable) 0.103ct
Sale price¥29,800
American Benitoite 0.123ct Loose Stone (Emerald Cut)
Sale price¥39,800
American Benitoite 0.107ct Loose Stone (Emerald Cut)
Sale price¥35,800
American Benitoite 0.104ct Loose Stone (Emerald Cut)
Sale price¥29,800
Bicolor Benitoite 0.130ct loose (emerald cut)
Sale price¥65,800
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
Brazilian Santa Maria Aquamarine 0.524ct Loose Stone
Sale price¥55,800
Kenyan Tsavorite 1.026ct Loose Stone
Sale price¥98,000
Colombian emerald 0.105ct loose
Sale price¥31,800
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 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
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.