The best gifts, as the saying goes, come in small packages. In particular, we’re talking about the kinds encased in a hinged box, often lined in velvet or satin, that opens to reveal something sparkly ...
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 ...