The 4Cs describe the individual qualities of a diamond, and the value of an individual diamond is based on these qualities. The terms that people use to discuss the 4Cs have become part of an …

Diamond stands at the apex of the hardness scale with a value of 10. It also has the highest thermal conductivity and the highest molar density of any terrestrial material, as well as a high resistance to …

Fancy Color Diamond Dazzling brilliance. Captivating color. These are the planet’s most valued gems.

May 3, 2024 · Examines new developments in the story of diamond formation and their extraction from the earth.

Mar 14, 2013 · The prospect of purchasing a diamond may seem daunting, but through GIA, an unbiased authority on diamonds, you have several handy resources to help you select the highest …

Nov 24, 2015 · Diamond crystals are brought closer to the Earth’s surface through volcanic activity. Diamonds can be found in shallow alluvial deposits where the crystals settle after being transported …

As the home of gemological research and education, we invented many of the instruments used by the international gem and jewelry industry, and we even created the 4Cs of diamond quality.

GIA’s Guide to Gemstones: Gem Encyclopedia GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional …

External Morphology and Internal Zonal Structure of Macle Diamond Investigates the morphological changes of macle diamonds during the growth process by exploring their three-dimensional internal …

This 1925 photo taken at the Green Vaults by Rosch and Krumbhaar shows crown and pavilion views of the Dresden Green, along with a 17-ct drilled briolette-cut colorless diamond and a light blue …