Calcite-filled crack in a hematized siltstone. #Calcite has rhombohedra cleavage, which is BEAUTIFULLY displayed in both PPL & XPL. fov = 3 mm. #ThinSectionThursday pic.twitter.com/NN7LNkjaee
— Melissa Scruggs (@VolcanoDoc) May 23, 2019
via Twitter https://twitter.com/VolcanoDoc
May 23, 2019 at 07:27PM
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