Aggregate of sillimanite needles in a coarse muscovite. Migmatitic gneiss provided by @MarmiRossi
— micROCKScopica (@micROCKScopica) August 10, 2018
Have a nice #weekend pic.twitter.com/iM8GpbEXOO
via Twitter https://twitter.com/micROCKScopica
August 10, 2018 at 07:28PM
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