Biotite crystal, now completely replaced by green chlorite (with blue interference colors), altered feldspar and colorless quartz (with grey interference colors) in a altered granodiorite from Crevola, Ivrea Verbano zone, Italy. PPL and XPL image, 2x (Fov 7 mm). #thinsection https://t.co/WxwyMTiZJt
— Alexstrekeisen (@alexstrekeisen) Aug 31, 2021
via Twitter https://twitter.com/alexstrekeisen
August 31, 2021 at 11:57PM
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