Birthstone list
0.274 ct Loose Colombian Bi-Color Emerald
Sale price¥98,000
8.020 ct Boulder Opal Loose Stone from Australia with Certificate
Sale price¥69,800
Pink Diamond 0.137ct Loose (FANCY DEEP BROWNISH PINK, I-1)
Sale price¥29,800
Ruby 0.286ct Loose Stone with Certificate
Sale price¥22,800
Loose Brown Diamond 0.290ct (FANCY BROWN, SI-2)
Sale price¥15,800
Diamond 3.7mm/0.318ct Loose (F, SI-1, Princess Cut)
Sale price¥49,800
Colombian mint color emerald 0.136ct loose stone
Sale price¥6,980
Colombian mint color emerald 0.155ct loose stone
Sale price¥7,980
Colombian Trapiche Emerald 0.422ct Loose
Sale price¥18,800
Bicolor Tanzanite 1.677ct rough stone
Sale price¥7,980
Bicolor Tanzanite 5.582ct rough stone
Sale price¥18,800
Colombian emerald 0.499ct rough stone
Sale price¥14,800
Colombian emerald 0.443ct rough stone
Sale price¥8,800
K18 Aquamarine Chain Ring
Sale price¥24,800
K18 Peridot Chain Ring
Sale price¥22,800
K18 Amethyst Chain Ring
Sale price¥18,800
Mexican Cantera Opal 17.284ct Loose
Sale price¥39,800
Loose diamond 3.5mm/0.167ct (G, VS-1, VeryGood)
Sale price¥29,800
Diamond 3.8mm/0.197ct Loose (E, VVS-1, VeryGood)
Sale price¥39,800
Diamond 3.5mm/0.167ct Loose (D, VVS-2, VeryGood)
Sale price¥37,800
Diamond 3.8mm/0.211ct Loose Stone (E, VS-2, Excellent)
Sale price¥49,800
Diamond 3.8mm/0.216ct Loose (G, VS-1, Excellent)
Sale price¥49,800
Diamond 3.8mm/0.207ct Loose (F, VS-1, Excellent)
Sale price¥35,800
[Color-furi] K18 Fire Opal Ring with Certificate of Authenticity
Sale price¥49,800
[Calafuri] K18WG Yellow Sapphire 0.05ct Pendant Top (Necklace Top)
Sale price¥79,800
Mexican Cantera Opal 7.520 ct Loose Stone with Appraisal
Sale price¥24,800
Mexican Cantera Opal 5.811 ct Loose Stone with Certificate
Sale price¥29,800
Ruby 0.528ct Loose Stone with Gem Identification Report
Sale price¥28,800
0.689ct Loose Colombian Emerald
Sale price¥18,800
Brazilian Indicolite Tourmaline 0.352ct Loose Stone with Certification
Sale price¥29,800
Mozambique Almandine Garnet 17.770ct Loose Stone
Sale price¥98,000
Unheated Brazilian Imperial Topaz (Sherry Color) 0.314ct Loose
Sale price¥22,800
Brazilian unheated imperial topaz (sherry color) 0.368ct loose gemstone
Sale price¥25,800
Madagascar Bekily Blue Garnet (Color Change Garnet) 0.257ct Loose Stone
Sale price¥25,800
Madagascar Bekily Blue Garnet (Color Change Garnet) 0.167ct Loose
Sale price¥16,800
Madagascar Bekily Blue Garnet (Color Change Garnet) 0.188ct Loose Stone
Sale price¥18,800
0.186ct loose Bekily blue garnet (color-change garnet) from Madagascar
Sale price¥18,800
0.213ct Loose Bekily Blue Garnet (Color Change Garnet) from Madagascar
Sale price¥22,800
Benitoite 0.272ct loose stone (emerald cut)
Sale price¥248,000
Burmese ruby 3.72ct loose GIA/CGL
Sale price¥298,000
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.