Colombian emeralds for sale from the mines of Muzo, Chivor, Coscuez, La Pita, Pena Blanca, Totumos, Cunas and Gachala.
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Gemological Properties
Chemical Composition  Be3Al2(SiO3)6 + Cr and/or Vn     Beryllium Aluminum cyclosilicate with traces of Chromium and/or Vanadium
Crystalline System Hexagonal
Color From light yellowish green to dark bluish green and everything in between.
Hardness 7.5 - 8
Density 2.68 - 2.78
Refractive Index 1.577 - 1.593
Birefringence 0.005 - 0.009
Occurrence The finest emeralds are from Colombia at Chivor, Muzo, Gachala', Coscuez, La Pita, Totumos, Penas Blancas, Cunas and Polveros mines. Other fine emeralds come from Zambia, Brazil, Pakistan, Russia, Tanzania (Lake Manyara). Colombian emeralds from Muzo and Chivor opposed to Coscuez can be distinguished in a general way because Muzo/Chivor material is blue-green, whereas that from Coscuez is yellowish green.


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