Beryl (Var: Emerald) Crystal Cluster in Biotite - Bahia, Brazil

This is a beautiful green beryl emerald crystal cluster from Bahia, Brazil. The largest emerald is .9" long, and is surrounded by emerald chunks and biotite. The color displayed by this emerald cluster is deep and lustrous.

Beryl is a mineral composed of beryllium aluminum cyclosilicate, with the chemical formula Be3Al2(SiO3)6. Naturally occurring beryl tends to form hexagonal crystals that can reach several meters in size if given the right conditions. Completely pure beryl will be transparent and colorless, while mineral impurities frequently tint the crystals color in most specimens.

Well known varieties of beryl include aquamarine and emerald, although beryl can also be green, blue, yellow, white and red, depending on the incorporated impurities during formation. Red beryl is its rarest form, and can currently only be found in New Mexico and Utah.
Beryl & Biotite
Carnaíba mining district, Pindobaçu, Campo Formoso ultramafic complex, Bahia, Brazil
Crystal measurement: .9" long, .6" wide. Matrix 2.2" long, 1.7" wide