Birthstone list
Montana Sapphire 0.397ct loose (bicolor sapphire)
Sale price¥12,800
Madeira citrine 0.170ct loose
Sale price¥5,980
Zimbabwe Green Diamond Rough (Sawable) 0.402ct Rough Stone with Trigon
Sale price¥148,000
Russian Demantoid Garnet (Horsetail) 5.8mm/0.851ct Loose Stone
Sale price¥198,000
Brazilian Blue Tourmaline in Quartz 3.379ct Loose Stone
Sale price¥15,800
Brazilian Blue Tourmaline in Quartz 9.251ct Loose Stone
Sale price¥39,800
Mexican fire opal 2.499ct loose stone
Sale price¥18,800
Mexican egg-in opal 2.125ct loose stone
Sale price¥15,800
Mexican egg-in opal 4.879ct loose stone
Sale price¥29,800
Mexican Egg-in-Opal 3.195ct Loose Stone
Sale price¥19,800
Mexican egg-in opal 3.646ct loose stone
Sale price¥25,800
Brazilian Limonite in Topaz 5.029ct Loose Stone (Rainbow)
Sale price¥15,800
Brazilian Limonite in Blue Topaz 9.314ct Loose Stone
Sale price¥25,800
0.834 ct loose Sky Blue Topaz from Brazil
Sale price¥8,800
Brazilian Sky Blue Topaz 0.746ct Loose Stone
Sale price¥8,800
Montana Sapphire 0.515ct loose (bicolor sapphire)
Sale price¥15,800
Yellow sapphire 0.464ct loose
Sale price¥9,800
Yellow sapphire 0.294ct loose
Sale price¥8,800
Australian shell opal 53.277ct rough stone
Sale price¥59,800
Aquamarine in quartz 18.954ct rough stone
Sale price¥18,800
Brazilian Paraiba tourmaline in quartz 1.602ct loose
Sale price¥39,800
Zimbabwe Green Diamond Rough (Sawable) 0.428ct Rough Stone with Trigon
Sale price¥158,000
Brazilian Blue Tourmaline 0.819ct Loose Stone
Sale price¥31,800
Tanzanite from Tanzania 0.416ct loose stone
Sale price¥12,800
Brazilian Amethyst 2.975ct Loose Stone
Sale price¥9,800
Loose Brazilian rose amethyst, 2.626 ct
Sale price¥9,800
Mozambican Almandine Garnet 1.363ct Loose Stone
Sale price¥12,800
[Rouge Cut] Mexican Fire Opal 1.458ct Loose Stone
Sale price¥18,800
[Rouge Cut] Pink Tourmaline from Brazil 0.440ct Loose
Sale price¥9,800
Bicolor Paraiba tourmaline 2.477ct loose DGL version
Sale price¥298,000
Unheated Bicolor Paraiba Tourmaline 0.092ct Loose GIA
Sale price¥188,000
Bicolor Tourmaline 0.649ct Loose Stone, Japan-Germany
Sale price¥12,800
Zambian Canary Yellow Tourmaline 0.158ct Loose Stone
Sale price¥9,800
Australian black opal 0.758ct loose stone
Sale price¥35,800
Australian Black Opal 0.768ct Loose
Sale price¥25,800
Australian Black Opal 0.754ct Loose
Sale price¥22,800
Australian Black Opal 0.940ct Loose
Sale price¥18,800
Australian Black Opal 0.754ct Loose
Sale price¥22,800
Australian Black Opal 0.605ct Loose Stone
Sale price¥22,800
Australian Black Opal 0.387ct Loose
Sale price¥18,800
Australian black opal 1.311 ct loose stone
Sale price¥18,800
Australian black opal loose stone, 0.618ct
Sale price¥15,800
Australian Black Opal 0.744ct Loose Gemstone
Sale price¥18,800
Australian Black Opal 0.415ct Loose
Sale price¥18,800
Australian black opal, 0.666ct loose
Sale price¥12,800
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.