Characteristics of Emeralds

Geologically speaking,   Colombian emeralds are said to be the purest emeralds in the world because Colombian emerald  deposits are the only ones

 on  earth  found  in  sedimentary  host  rock  rather  than  in  Igneous rock.  The tectonic movements that created the  Andes Mountains force the raw 

materials of emeralds—beryllium, chromium, and vanadium—found in the ground into liquid and gaseous states. These materials, in such states, find 

their  way  into  cracks  in the  already  sedimentary  medium  surrounding them and then eventually cool and crystallize. A saline solution found in the 

sedimentary rock eventually washes out impurities such as iron that cloud other beryls from forming onto the crystallizing stone. This intricate 

process  produces the emeralds found in the mines of Colombia.