Not only is it #InternationalRockDay. It is also #thinsectionthursday!
— micROCKScopica (@micROCKScopica) July 13, 2017
Serpentinised olivine in silicate marble by @MarmiRossi #Nature #Art http://pic.twitter.com/3APjnebbQv
via Twitter https://twitter.com/micROCKScopica
July 14, 2017 at 01:45AM
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