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Beryl is a mineral composed of 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. (source: Wikipedia) photo by Michael Marcotte, of specimen on display at the Field Museum public domain photo courtesy of Wikipedia Return to List Back to Michael's Hobbies page Back to Michael Marcotte's HomePage