#SundayMorning micrograph: sillimanite needles in muscovite#sciart #vacations #microscopy #rocks #geology #nature #colors #blue #minerals http://pic.twitter.com/XSWwkJdWf3
— micROCKScopica (@micROCKScopica) August 6, 2017
via Twitter https://twitter.com/micROCKScopica
August 06, 2017 at 12:14PM
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