Allanite (epidote) crystal with radial fractures, (due to the emission of radioactive particles) and brown biotite in a granite from Amparo, Brazil. PPL (plane polarized light), 10x#alexstrekeisen #allanite #granite #Brazil pic.twitter.com/fSGw3cu2ZH
— Alexstrekeisen (@alexstrekeisen) June 23, 2020
via Twitter https://twitter.com/alexstrekeisen
June 23, 2020 at 06:18PM
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