Frederick William Rudler

“ In chrysoberyl, however, the beryllium exists as an aluminate, having the formula BeAl2O4, or BeO·Al2O3. The analysis of a specimen of Brazilian chrysoberyl gave alumina 78·10, beryllia 17·94, and ferric oxide 4·88%. The typical yellow colour of the stone inclines in many cases to pale green, occasionally passing into shades of dark green and brown. The iron usually present in the mineral seems responsible for the green colour. Chrysoberyl is often mistaken by its colour for chrysolite (q.v.) ”