Two pleochroism animated GIFs

September 15, 2011 by Callan Bentley

Biotite in granite:

Riebeckite:

Fast and slow versions of each. Wanted to post these ASAP, so someone can use them for the Geology Word of the Week…

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Devon

September 16, 2011 at 5:06 pm

Great post! I can’t wait to show these to my students in the sed pet lab later this semester!
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