Emerald Facts @ Jewel Info 4 U

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Emerald Facts

Author: , 11/29/2004 7:33:39 PM

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Emerald Properties

Emerald

Chemical Composition	It is Beryllium Alumino Silicate and the chemical formula is Be3Al2(SiO3)6.
Colours	Green or blue green.
Streak	White
Refractive Index	1.57 - 1.60
Specific Gravity	2.6-2.9
Luster	Vitreous.
Solid State	Transparent to translucent.
Crystal System	Hexagonal crystal system.
Hardness	7.5-8 Mohs.
Cleavage	Poor.
Fractures	Conchoidal.
Bi-refringence	0.004 - 0.008
Pleochroism	Weak.
Tenacity	Brittle.
Synthetic Availability	Yes
Enhancement	Mostly enhanced.
Source	Russian, India, Austria. Zambia, Columbia, Brazil, Zimbabwe, Egypt, Afghanistan, Norway, Madagascar, Mozambique, Tanzania, Nigeria and the United States of America.
Precautions	Must be protected from water, steam, acids, harsh chemicals, sharp blows and scratches. Excessive heat and sudden temperature changes should be avoided.

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