The mineral beryl is a beryllium aluminium cyclosilicate with the chemical formula Be3Al2(SiO3)6. The hexagonal crystals of beryl may be very small or range to several meters in size. Terminated crystals are relatively rare. Pure beryl is colorless, but it is frequently tinted by impurities; possible colors are green, blue, yellow, red, and white. The name beryl is derived (via Latin: beryllus, Old French: beryl, and Middle English: beril) from Greek_ beryllos which referred to a ''precious blue-green color-of-sea-water stone'' and originated from Prakrit veruliya and Pali vea__uriya; vea__iru or, via_ 'to become pale'; ultimately from Sanskrit vaidurya-, which is of Dravidian origin, maybe from the name of Belur. The term was later...'
Contributions by Vsmith, Materialscientist, and CalicoCatLover.