Birthstone list
Brazilian Green Tourmaline 0.831ct Loose Stone
Sale price¥25,800
Afghanistan Seafoam Tourmaline 0.253ct Loose Stone
Sale price¥15,800
Afghanistan Blue Tourmaline 5.0mm/0.457ct Loose Stone
Sale price¥19,800
Brazilian Green Tourmaline 4.1mm/0.259ct Loose Stone
Sale price¥12,800
Brazilian Green Tourmaline 0.236ct Loose Stone
Sale price¥9,800
Brazilian Swiss Blue Topaz 6.4mm/1.225ct Loose Stone
Sale price¥9,800
Vietnam Aquamarine 5.6mm/0.577ct Loose Stone
Sale price¥6,980
Silky diamond 2.7mm/0.086ct loose
Sale price¥14,800
Tanzanite 0.513ct loose stone (sugarloaf cut) from Tanzania
Sale price¥9,800
Madagascar pink sapphire 0.486ct loose stone
Sale price¥12,800
Madagascar sapphire 0.206ct loose stone
Sale price¥12,800
Madagascar Yellow Sapphire 0.493ct Loose
Sale price¥9,800
Afghanistan Bicolor Tourmaline 2.664ct Loose Stone (Seafoam Tourmaline)
Sale price¥128,000
Brazilian Green Tourmaline 1.031ct Loose Stone
Sale price¥22,800
Brown diamond 0.554ct loose (cabochon cut, SI class equivalent)
Sale price¥69,800
Sri Lankan Yellow Sapphire 0.300ct Loose
Sale price¥12,800
Colombian Trapiche Emerald 0.811ct Loose
Sale price¥59,800
Mozambique Almandine Garnet 1.237ct Loose Stone
Sale price¥12,800
Madagascar pink sapphire 0.466ct loose stone
Sale price¥12,800
Sri Lankan Star Sapphire 5.0mm/0.892ct Loose Stone
Sale price¥9,800
Colombian emerald 0.126ct loose stone
Sale price¥15,800
Tanzanite from Tanzania 1.053ct loose stone
Sale price¥25,800
Tanzanite from Tanzania 0.580ct loose stone
Sale price¥14,800
Hollandite in Amethyst 3.048ct loose stone
Sale price¥9,800
Tanzanian bicolor sapphire 0.950ct loose stone
Sale price¥25,800
Tanzanian bicolor sapphire 0.707ct loose stone
Sale price¥18,800
Tanzanian bicolor sapphire 0.598ct loose stone
Sale price¥16,800
Tanzanian bicolor sapphire 0.571ct loose stone
Sale price¥15,800
Tanzanian bicolor sapphire 0.623ct loose stone
Sale price¥16,800
Brazilian Paraiba Tourmaline in Quartz 0.295ct Loose Stone
Sale price¥14,800
Madagascar Blue Sapphire 4.0mm/0.326ct Loose
Sale price¥11,000
Madagascar White Sapphire 0.485ct Loose
Sale price¥19,800
YAG (Yttrium Aluminum Garnet) 2.861ct loose stone
Sale price¥25,800
Sri Lankan White Sapphire 4.0mm/0.242ct Loose Stone
Sale price¥12,800
Brazilian Swiss Blue Topaz 17.410ct Loose
Sale price¥27,800
Brazilian Swiss Blue Topaz 11.536ct Loose
Sale price¥14,800
Brazilian Swiss Blue Topaz 10.958ct Loose
Sale price¥14,800
Russian Demantoid Garnet 2.5mm/0.111ct Loose Stone
Sale price¥18,800
Nepalese Kyanite 0.793ct loose stone
Sale price¥6,980
Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.170ct Loose
Sale price¥17,800
Afghanistan Bicolor Tourmaline 0.672ct Loose Stone
Sale price¥9,800
Afghanistan Bicolor Tourmaline 0.471ct Loose Stone
Sale price¥9,800
Afghanistan Bicolor Tourmaline 0.673ct Loose Stone
Sale price¥15,800
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.