PPL and XPL: Altered pyroxene (brown) and smaragdite (high interference colours) in a smaragdite-bearing metagabbros from Monviso, Italy. Smaragdite is an emerald green variety of actinolite, owing its colour to a faint chromium content. 2x (FOV = 7 mm) pic.twitter.com/YhLmk7Zfj1
— Alexstrekeisen (@alexstrekeisen) February 28, 2021
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February 28, 2021 at 10:53PM
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