Large glaucophane crystals (blue in PPL and with low Interference colors at XPL), epidote (brown at PPL and with high interference color at XPL) and muscovite in a Epidote-Blueschist from Cervinia, Aosta Valley, Italy. PPL and XPL 2X (Fov = 7 mm). #thinsection #glaucophane https://t.co/ajSc3OJsnP
— Alexstrekeisen (@alexstrekeisen) Aug 1, 2021
via Twitter https://twitter.com/alexstrekeisen
August 01, 2021 at 04:09PM
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