Gemstone Shapes and Styles: A Complete Guide for Buyers and Sellers Walk into any well-stocked jewellery store and you will encounter gemstones in dozens of shapes: the timeless round, the…
Carat Weight and Pricing: Why Size Isn't Everything in Gemstone Value Ask most people how gemstones are priced and they will say: by the carat. The larger the stone, the…
The Relationship Between Gemstone Value Factors: How the Four Cs Work Together The four Cs — colour, clarity, cut, and carat weight — are the most widely known framework for…
Rare Gemstones and Geological Rarity: Why Some Gems Command Extraordinary Prices Most of the gemstones available in the market — diamonds, rubies, sapphires, emeralds — are relatively well-known and broadly…
The Science of Gem Formation: How the Earth Creates Precious Stones Every gemstone begins as a coincidence of geology. The right elements, at the right temperature and pressure, in the…
Charoite: The Complete Guide Charoite is a gem found in only one place on Earth -- a remote area of Siberia in Russia -- and its swirling violet-purple patterns with…
Ammolite: The Complete Guide Ammolite is one of the rarest organic gem materials in the world and one of the most visually spectacular. It is the iridescent shell material of…
Moldavite: The Complete Guide Moldavite is the only gemstone of confirmed extraterrestrial origin available in the commercial market. It is not a mineral from space -- it is the result…
Diamond: The Complete Professional Guide Diamond is the most commercially important gemstone in the world and, for most fine jewellery professionals, the foundation of their business. Yet surprisingly many jewellery…
Fancy Colored Diamonds The most expensive gemstones sold at auction are not D-colour flawless diamonds. They are fancy coloured diamonds -- and specifically, the rarest fancy pinks and fancy blues.…