Gemstone Characteristics
Emerald

Chemical Composition:
Be3 Al2 (Si O3)6
Hardness: 7.75
Refractive Index: 1.57 - 1.58
Specific Gravity: 2.65 - 2.76
Lustre: Vitreous.
Locations Where Found:
Columbia, Russia, Egypt, Brazil, Pakistan.
Colours: Green.

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