A large crystal of muscovite (pale yellow and blue) with diagonal cleavage contains some needles/aggregates of sillimanite in this migmatite provided by @MarmiRossi #scicomm #geology #SundayMotivation #minerals #abstractart #colors pic.twitter.com/pl64LpRqvY
— micROCKScopica (@micROCKScopica) July 1, 2018
via Twitter https://twitter.com/micROCKScopica
July 01, 2018 at 05:22PM
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