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EMERALD
Chemical Composition: Beryllium Aluminium Sillicate, Be 3 Al 2 (SiO 3 ) 6
Refractive Index: 1.57 - 1.60
Specific Gravity: 2.65 - 2.80
Crystal System: Hexagonal
Moh's Hardness: 7 ½
Emeralds are apart of the Beryl family and owe its green colour to traces of
chromium or vanadium. Almost all natural stones contain fissures and
inclusions making them a brittle stone that is easily chipped. These inclusions
are important as they help to distinguish the natural stones from the synthetic
emeralds as well as other green stones.
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Localities for Emeralds include Columbia, India, Zambia, Zimbabwe, Brazil
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