Birthstone list
Pigeon Blood Ruby 4.0mm/0.290ct Loose Stone AIGS
Sale price¥59,800
Russian Demantoid Garnet (Horsetail) 0.487ct Loose Stone
Sale price¥110,000
Greenland Ruby 3.6mm/0.210ct Loose Stone with Certificate
Sale price¥45,800
[12552640] Unheated Brazilian Paraiba Tourmaline 0.073ct loose stone
Sale price¥49,800
[12552618] Unheated Brazilian Paraiba Tourmaline 0.063ct loose stone
Sale price¥49,800
[Posted 12549094] Sri Lankan sapphire cat's eye 3.739ct loose
Sale price¥59,800
[Posted in 12548907] Yellow tourmaline 0.469ct loose
Sale price¥8,800
[12548587 published] Star sapphire from Sri Lanka 1.325ct loose
Sale price¥5,980
[Posted in 12547848] Green tourmaline 0.869ct loose
Sale price¥15,800
Brazilian Aquamarine 8.858ct Loose Stone
Sale price¥198,000
Aquamarine 1.574ct loose stone
Sale price¥9,800
Pink zoisite from Tanzania 6.7mm/1.393ct loose (peach tanzanite)
Sale price¥128,000
Mali Garnet (Grossular/Andradite Garnet) 4.5mm/0.497ct Loose
Sale price¥8,800
Australian boulder opal 0.874ct loose
Sale price¥3,980
Australian boulder opal 1.156ct loose
Sale price¥3,980
Australian boulder opal 1.173ct loose
Sale price¥5,980
Mexican Cantera Opal 14.690ct Loose
Sale price¥12,800
Tanzanian purple sapphire 0.355ct loose stone
Sale price¥9,800
Mexican Cantera Opal 1.120ct Loose
Sale price¥8,800
[Rouge Cut] Brazilian Bicolor Tourmaline 0.578ct Loose
Sale price¥9,800
Rouge Cut Almandine Garnet from Mozambique, 5.952ct Loose
Sale price¥15,800
Brazilian Rubellite 4.078ct Loose Stone
Sale price¥98,000
Mozambique Almandine Garnet 2.959ct Loose Stone
Sale price¥19,800
Mozambique Almandine Garnet 1.652ct Loose Stone
Sale price¥15,800
Mozambique Almandine Garnet 7.7mm/1.781ct Loose Stone
Sale price¥18,800
Vietnamese aquamarine 1.728ct loose stone
Sale price¥18,800
Australian boulder opal 1.868ct loose
Sale price¥18,800
Australian boulder opal 1.675ct loose
Sale price¥14,800
Australian boulder opal 28.880ct loose
Sale price¥59,800
Brazilian Paraiba tourmaline 0.275ct loose (CuO:1.5%.MnO:2.3%)
Sale price¥398,000
[12541314 published] Ametrine 2.429ct loose
Sale price¥39,800
[Posted 32501454] Pink Diamond 0.051ct Loose (FANCY LIGHT PINK, SI-2)
Sale price¥39,800
Russian demantoid garnet (horsetail recognized) 0.291ct loose
Sale price¥49,800
YAG (yttrium aluminum garnet) 1.792ct loose
Sale price¥12,800
Brazilian Paraiba Tourmaline 0.039ct Loose Stone (CuO: 2.0%, MnO: 2.3%)
Sale price¥45,800
South African rough diamond (sawable) 0.105ct rough (with trigon)
Sale price¥39,800
Blue sapphire 4.1mm/0.332ct loose stone
Sale price¥25,800
Blue sapphire 0.291ct loose stone
Sale price¥18,800
Tanzanian Bicolor Grossular Garnet 1.359ct Loose Stone
Sale price¥49,800
Australian boulder opal 9.120ct loose
Sale price¥98,000
Brazilian Swiss Blue Topaz 1.065ct Loose Stone
Sale price¥11,000
Sierra Leone sapphire 1.470ct loose
Sale price¥9,800
Australian opal 14.837ct loose
Sale price¥98,000
Mexican Fire Opal 1.580ct Loose
Sale price¥25,800
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.