Emerald — specimen 0355, photo © NMNHS
Afghanistan, Panjshir, Panjshir Valley, 35.42639°N 69.83333°E
Weight: 0.14 ct; size: 3.12 | 3.01 | 2.24 mm; shape: octagon; colour: light very slightly bluish green; very slightly greyish; clarity: eye clean; cut: good; treatment: none.
Lightly coloured, very clean specimen; good step cut style. Source: Grey Weaver, Custom Facetor LLC
More information from ‘Classification’
A green variety of the beryl; coloured by chromium or/and vanadium.