Brazilian Deep Green Emerald Cushion Cabochon

About Emerald

Emerald is the green variety of beryl, a mineral whose crystal structure is based on beryllium, aluminium, silicon and oxygen. Its colour comes mainly from traces of chromium and/or vanadium. Shades range from yellowish green to bluish green; a vivid, moderately dark green is especially valued. Most natural emeralds contain tiny fractures, fluid-filled cavities or mineral inclusions, collectively known in the trade as a…