Guides
Practical notes for comparing certified diamonds and coloured gemstones — including how to read a report, judge fluorescence and bow-tie, and browse live listings.
These guides explain carat, cut, color, clarity, certificates, fluorescence, lab-grown growth methods, size, and origin for diamonds, plus coloured-gem topics such as treatments, ruby versus sapphire, and buying loose stones online. They do not replace the certificate on a specific stone. When you are ready to compare prices, open diamond search or gemstone search.
Carat Mate lists certified loose diamonds for shoppers in the United States, Canada, the UAE, London, and Australia. Prices are in USD everywhere. We ship to the United States, Canada, the UAE, London, and Australia.
