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Beryl

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Chemical Formula

Be3Al2Si6O18

Color

White, Colorless, Blue, Red, Green, Yellow, Orange, Brown, Pink, Purple

Hardness

7.5 - 8.0

Crystal System

Hexagonal

Refractive Index

1.57 - 1.58

SG

2.6 - 2.8

Transparency

Transparent to opaque

Double Refraction

.006

Luster

Vitreous

Cleavage

3,1 - basal

Mineral Class

Beryl

 

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