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PPL (plane polarised light) and XPL (cross polarised light): Pyroxene (green) and Skeletal olivine crystals in a Etruscan (pre-Roman ege) Furnace Slag, Campiglia Marittima (Livorno province), Italy. 10x (Field of view = 2mm) pic.twitter.com/5QuYrzZMfB

— Alexstrekeisen (@alexstrekeisen) November 17, 2020

via Twitter https://twitter.com/alexstrekeisen

November 17, 2020 at 08:02PM