Granular cassiterite (brown at PPL) and blue tourmaline crystals. St. Just mine, Cornwall. PPL (plane polarised light) and XPL (cross polarised light) image, 2x (Field of view = 7mm)#alexstrekeisen #cassiterite #tourmaline #ThinSection #england pic.twitter.com/h3m09TZn9R
— Alexstrekeisen (@alexstrekeisen) April 3, 2021
via Twitter https://twitter.com/alexstrekeisen
April 03, 2021 at 05:25PM
No comments:
Post a Comment