Rome’s Pliny the Elder described emerald in his Natural History, published in the first century AD ... The Incas had already been using emeralds in their jewelry and religious ceremonies for 500 years ...
A hand-held flashlight reveals the green color of a rough emerald from the Coscuez Emerald mine in Colombia. Photo by Eric Welch/GIA. Emerald is the green to bluish green variety of beryl, a mineral ...