Zircon, enclosed in biotite, with pleochroic halo. XPL image, 20x #ThinSectionThursday #zircon #biotite #alexstrekeisen https://t.co/FK0boJIY32
— Alexstrekeisen (@alexstrekeisen) Jul 15, 2021
via Twitter https://twitter.com/alexstrekeisen
July 15, 2021 at 06:39PM
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