Birthstone list
Russian demantoid garnet (horsetail recognized) 2mm/0.053ct loose
Sale price¥7,980
Brazilian Paraiba tourmaline in quartz 2.864ct loose
Sale price¥9,800
Brazilian Paraiba tourmaline in quartz 2.801ct loose
Sale price¥9,800
[Rouge cut] Mozambique almandine garnet 0.954ct loose stone
Sale price¥9,800
[Rouge cut] Mozambique almandine garnet 0.904ct loose stone
Sale price¥9,800
Mexican Cantera Opal 3.176ct Loose
Sale price¥39,800
Mexican Cantera Opal 2.038ct Loose
Sale price¥29,800
Mexican Cantera Opal 3.167ct loose stone (faceted cut)
Sale price¥12,800
Andesine Labradorite (commonly known as Rainbow Moonstone) 0.568ct loose
Sale price¥12,800
Madagascar Green Sapphire 0.435ct Loose
Sale price¥13,800
Russian Demantoid Garnet (Horsetail certified) 2.6mm/0.091ct loose stone
Sale price¥15,800
Russian demantoid garnet (horsetail recognized) 0.105ct loose
Sale price¥14,800
Brazilian unheated pink imperial topaz (sherry pink) 0.476ct loose stone
Sale price¥39,800
Mexican Fire Opal (Faceted Cut) 0.918ct Loose
Sale price¥12,800
Mexican Fire Opal (Faceted Cut) 0.525ct Loose
Sale price¥12,800
Synthetic black opal 2.996ct loose stone
Sale price¥29,800
Madagascar Blue Sapphire (Ice Blue) 0.584ct Loose
Sale price¥19,800
Sri Lankan Blue Sapphire 0.251ct Loose
Sale price¥12,800
Montana sapphire 0.370ct loose stone
Sale price¥9,800
Sri Lankan Yellow Sapphire 0.365ct Loose
Sale price¥15,800
[Takeshi Yamamoto] Brazilian Ametrine 24.465ct loose stone
Sale price¥98,000
White Topaz 2.563ct Loose (Needle-in Topaz)
Sale price¥5,980
K18PG Brazilian Paraiba Tourmaline 0.49ct Paraiba Tourmaline Ring GIA
Sale price¥198,000
Pt950 Sri Lankan purple sapphire 0.318ct and blue sapphire earrings
Sale price¥39,800
Pt950 Colombian Euclase 0.07ct Diamond Ring
Sale price¥89,800
Violet Sapphire 3.9mm/0.265ct Loose
Sale price¥8,800
Madagascar Violet Sapphire 4.0mm/0.300ct Loose
Sale price¥8,800
Sri Lankan Blue Sapphire 1.162ct Loose Stone (Rainbow Inclusions)
Sale price¥15,800
Tanzanian bicolor tanzanite 0.815ct loose stone
Sale price¥11,000
Tanzanite from Tanzania 0.878ct loose stone
Sale price¥14,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.783ct Loose Stone
Sale price¥15,800
Brazilian Paraiba Tourmaline in Quartz 0.712ct Loose Stone
Sale price¥15,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.676ct Loose Stone
Sale price¥15,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.728ct Loose Stone
Sale price¥12,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.718ct Loose Stone
Sale price¥18,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.735ct Loose Stone
Sale price¥15,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.723ct Loose Stone
Sale price¥15,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.751ct Loose Stone
Sale price¥15,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.704ct Loose Stone
Sale price¥15,800
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.656ct Loose Stone
Sale price¥15,800
Brazilian bicolor topaz 1.932ct loose stone
Sale price¥18,800
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.