The stunning glassiness and clarity of the best Chivor emeralds sets them apart from emeralds of the other local mines. They tend to be a little bit darker in color (forest evergreen), but also a bit sharper and brighter inside. This piece is a beautiful single gem crystal, 36 carats, with inclusions of calcite and minute sparkling pyrite crystals. It is an outstanding emerald crystal and thumbnail, particularly for the price range. Joe Budd Photos.