A transparent grayish blue aquamarine was submitted which was interesting for its strikingly strong pleochroism. It displayed deep saturated blue along the e-ray (left), similar to sapphires, and a pale bluish green along the o-ray (right). Absorption spectra confirmed the sample to be an aquamarine rather than a Maxixe-type beryl.
Choudhary G. (2014) Aquamarine with Unusually strong Pleochroism. Gems & Gemology, Vol. 50, No. 3, pp 244-245
