Unheated Blue Sapphire 2.430ct Loose GIA
Sale price¥258,000
Pyrite in emerald from Chivor Mine, Colombia, 4.221 ct, loose
Sale price¥98,000
Nepalese Kyanite 2.906ct Loose Stone with Certification
Sale price¥19,800
0.048ct Loose Purple Diamond (FANCY VIVID PINK PURPLE, SI-1) CGL
Sale price¥198,000
Internally Flawless Diamond 4.4mm/0.320ct Loose (G, IF, 3Excellent) GIA
Sale price¥89,800
Ruby 0.820ct Loose Gem (Hohki-kyo)
Sale price¥39,800
Yellow Opal 0.372ct Loose (Faceted Cut)
Sale price¥8,800
Color change sapphire 0.473ct loose stone (purple sapphire)
Sale price¥25,800
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
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
0.464 ct Mozambique Ruby Loose Stone with Identification Report
Sale price¥29,800
Greenland sapphire 0.592ct loose stone
Sale price¥18,800
Sri Lankan Star Sapphire 6.477ct Loose
Sale price¥49,800
Sri Lankan Star Sapphire 7.111ct Loose
Sale price¥59,800
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
Sri Lankan Blue Sapphire (Ice Blue) 0.584ct Loose
Sale price¥8,800
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
0.559ct Brazilian Emerald Cat's Eye Loose Stone with Certificate
Sale price¥9,800
Brazilian Emerald Cat's Eye 0.459ct Loose Stone with Certification
Sale price¥9,800
Brazilian Emerald Cat's Eye 1.022ct Loose Stone with Appraisal
Sale price¥12,800
Australian Boulder Opal 41.775 ct Loose Stone
Sale price¥19,800
Australian Boulder Opal 12.216ct Loose
Sale price¥15,800
Green Kyanite from Nepal 0.764ct Loose
Sale price¥6,980
Colombian Trapiche emerald 0.611ct rough stone
Sale price¥59,800
Non-Oil Emerald 1.370ct Loose GIA
Sale price¥1,580,000
Colombian oil-free emerald 0.310ct loose stone
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.