Staurolite (yellow at PPL and with low Interference colors at XPL), muscovite (colorless at PPL) and biotite (brown at PPL) in a staurolite-schist from Resia, Val Venosta, South Tyrol, Italy. PPL and XPL image, 10x (Fov2 mm) #thinsectionThursday https://t.co/gDM1b6yugA
— Alexstrekeisen (@alexstrekeisen) Jun 24, 2021
via Twitter https://twitter.com/alexstrekeisen
June 24, 2021 at 03:10PM
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