Birthstone list
Mexican Hyalite Opal 5.0mm/0.378ct Loose Stone
Sale price¥11,000
Brazilian pyrope almandine garnet 0.925ct loose stone
Sale price¥9,800
Brazilian Aquamarine 0.546ct Loose Stone
Sale price¥8,800
Brazilian Aquamarine 0.499ct Loose Stone
Sale price¥7,980
Brazilian Aquamarine 0.362ct Loose Stone
Sale price¥8,800
Brazilian Aquamarine 0.578ct Loose Stone
Sale price¥12,800
Brazilian Madeira Citrine 0.867ct Loose Stone
Sale price¥9,800
Brazilian Madeira Citrine 0.564ct Loose Stone
Sale price¥8,800
Brazilian Madeira Citrine 0.602ct Loose Stone
Sale price¥8,800
Brazilian Madeira Citrine 0.672ct Loose Stone
Sale price¥6,980
Brazilian Madeira Citrine 4.7mm/0.414ct Loose Stone
Sale price¥8,800
Brazilian Madeira Citrine 0.489ct Loose Stone
Sale price¥7,980
Tanzanian Rhodolite Garnet 0.627ct Loose Stone
Sale price¥8,800
Brazilian Pink Tourmaline 0.361ct Loose Stone
Sale price¥9,800
Zambian Canary Yellow Tourmaline 0.25ct Loose Stone
Sale price¥9,800
Diamond 0.169ct loose (F, VS2)
Sale price¥18,800
Tanzanian bicolor sapphire 0.262ct loose stone
Sale price¥19,800
[Sakura Shape] Brazilian Green Tourmaline 6.7mm/1.057ct Loose Patch
Sale price¥39,800
Paraiba tourmaline from Brazil 3.1mm/0.151ct loose (CuO:1.1%, MnO:3.8%)
Sale price¥29,800
Brazilian Paraiba tourmaline in quartz 2.864ct 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
Mexican fire opal (faceted cut) 0.387ct loose stone
Sale price¥14,800
Russian Demantoid Garnet (Horsetail certified) 2.6mm/0.091ct loose stone
Sale price¥15,800
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
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
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
Brazilian Alexandrite 0.054ct Loose Stone (Emerald Cut)
Sale price¥18,800
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
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.