Emerald Minerals
Name and Composition - It is a green/pale green variety of beryl: Be3AI2 Si6O18 (alumino – silicate of beryllium).
Physical Properties - Pale green to deep coloured, transparent to transcluent, hexagonal crystals having vitreous to resinous lusture. Hardness is 7.5-8.
Mode of Occurrence - It occurs in beryl bearing pegmatites and also found dispersed in mica schist associated with such pegmatites.
Uses - Mainly used as gem stone in jewelary.
Mineral based Industries – Cutting and polishing/processing units.
Industrial Prospects – A large number of cutting and polishing units based on imported crude emerald. Still there is ample scope to establish more cottage industries.
Physical Properties
Hardness
Sp. gr.
Luster
Diaphaneity
Sp. gr.
Luster
Diaphaneity
7.5-8
Average 2.76
Vitreous
Transparent to opaque
Average 2.76
Vitreous
Transparent to opaque
Chemical Properties
Formula
Fracture
Formula mass
Crystal system
Fracture
Formula mass
Crystal system
Be3AI2 Si6O18
Conchoidal
537.50
Hexagonal
Conchoidal
537.50
Hexagonal
Indian Minerals
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