Birthstone list
Yellow Opal 0.372ct Loose (Faceted Cut)
Sale price¥8,800
Paraiba tourmaline from Brazil 0.061ct loose
Sale price¥25,800
Paraiba tourmaline from Brazil 0.049ct loose
Sale price¥19,800
Color change sapphire 0.473ct loose stone (purple sapphire)
Sale price¥25,800
Paraiba tourmaline from Brazil 0.018ct loose
Sale price¥12,800
Madagascar Green Sapphire 0.253ct Loose
Sale price¥9,800
Madagascar Yellow Sapphire 4.4mm/0.417ct Loose
Sale price¥14,800
Madagascar Blue Sapphire 0.302ct Loose
Sale price¥15,800
Madagascar pink sapphire 0.346ct loose stone
Sale price¥15,800
Madagascar pink sapphire 0.243ct loose stone
Sale price¥8,800
Bicolor tourmaline 4.448ct loose stone
Sale price¥55,800
Sri Lankan Blue Sapphire 0.519ct Loose
Sale price¥14,800
Diamond 3.7mm/0.197ct Loose (H, VS-1, Good)
Sale price¥29,800
Diamond 3.7mm/0.194ct Loose (H, VS-2, Excellent)
Sale price¥35,800
Diamond 3.7mm/0.190ct Loose (E, VVS-2, VeryGood)
Sale price¥34,800
Diamond 3.5mm/0.145ct Loose (F, VS-1, VeryGood)
Sale price¥26,800
Loose diamond 3.1mm/0.117ct (D, VVS-2, VeryGood)
Sale price¥23,800
Diamond 3.7mm/0.192ct Loose (F, VVS-2, VeryGood)
Sale price¥39,800
Diamond 3.7mm/0.184ct Loose (D, VS-1, VeryGood)
Sale price¥33,800
Diamond 3.3mm/0.172ct Loose (G, VS-1, Flanders Cut)
Sale price¥45,800
Brazilian Seafoam Tourmaline, 4.1mm/0.303ct loose stone
Sale price¥16,800
Brazilian Seafoam Tourmaline, 4.1mm/0.280ct Loose
Sale price¥15,800
0.464 ct Mozambique Ruby Loose Stone with Identification Report
Sale price¥29,800
Paraiba tourmaline from Brazil 0.071ct loose
Sale price¥19,800
Greenland sapphire 0.592ct loose stone
Sale price¥18,800
Almandine Garnet 0.814ct Loose Stone
Sale price¥7,980
Almandine Garnet 1.049ct Loose Stone
Sale price¥9,800
Sri Lankan Star Sapphire 6.477ct Loose
Sale price¥49,800
Sri Lankan Star Sapphire 7.111ct Loose
Sale price¥59,800
Mozambique Aquamarine 0.216ct Loose Stone
Sale price¥6,980
American Peridot 0.339ct Loose Stone
Sale price¥6,980
American Peridot 0.528ct Loose Stone
Sale price¥8,800
Aquamarine 0.327ct loose stone
Sale price¥9,800
Mexican Opal 9.6mm/1.803ct Loose (Contralus Opal)
Sale price¥49,800
Unheated Mozambique Ruby 2.7mm/0.135ct Loose
Sale price¥19,800
Colombian Trapiche emerald 0.418ct rough stone
Sale price¥39,800
[Colorful] Pt900 1.33ct Thai Sapphire and 0.12ct Diamond Ring GIA
Sale price¥198,000
[Colorful] Pt900 Madagascar Sapphire 0.99ct / Diamond 0.58ct Ring GIA
Sale price¥228,000
[COLORFUL] Pt900 Diamond 1.00ct Pendant (Necklace)
Sale price¥49,800
Untreated Color-Change Brazilian Paraiba Tourmaline 0.050ct Loose Stone GIA
Sale price¥128,000
Pink tourmaline 1.157ct loose stone
Sale price¥12,800
Australian black opal 0.650ct loose
Sale price¥15,800
Colombian emerald 0.145ct loose stone with precious stone
Sale price¥29,800
Colombian emerald 0.512ct loose stone (silky type)
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.