Beryl measurement, Tarashchan 1978

Reference	Tarashchan, A.N. (1978). Luminescence of minerals. Kyiv: Naukova Dumka.
Material	Beryl [ Be₃Al₂Si₆O₁₈ ] Beryl specimen from Violet Claims, Wawa Mountains, Beaver Co., UT, USA © Photo by Chip Clark, via Smithsonian National Museum of Natural History
Specimen temperature	Ambient
Technique	Unknown
Lines	Cr³⁺ 680 nm, 682 nm, Fe³⁺ 720 nm, Mn²⁺ 480 nm, 570 nm

Nominal composition of Beryl [ Be₃Al₂Si₆O₁₈ ].
Element	Atoms	At%	Wt%
Be	3	10.3	5.03
Al	2	6.9	10
Si	6	20.7	31.4
O	18	62.1	53.6