beryl

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beryl

beryl , mineral, a silicate of beryllium and aluminum, Be ₃ Al ₂ Si ₆ O ₁₈ , extremely hard, occurring in hexagonal crystals that may be of enormous size and are usually white, yellow, green, blue, or colorless. Beryl is commonly used as a gemstone. The refractive index is low, and the stones have little or no fire. The most valued variety of beryl is emerald . An aquamarine is a blue to sea-green beryl; morganites are rose-red beryls. It is the principal raw material for the element beryllium and its compounds.

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beryl

A Dictionary of the Bible | 1997 | | Â© A Dictionary of the Bible 1997, originally published by Oxford University Press 1997. (Hide copyright information) Copyright

beryl Mineral, beryllium silicate. Its crystals are usually hexagonal prisms of the hexagonal system. Gemstone varieties are aquamarine (pale blue-green) from Brazil; emerald (deep green) from Colombia; and morganite (pink) from Madagascar. Cut stones have little brilliance, but are valued for their intense colour. Hardness 8; r.d. 2.6–2.8.

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	The Beryl Cos. to Provide Information and Referral Services to The Heart Institute of Staten Island. Business Wire; 10/3/2001

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