#MinCup2020 Vote for birefringence, light and beauty! #VoteCorundum - a mineral that brightens up your thin sections. Look at this bright wee crystal, like a tiny X-Wing, flying over the surface of a plagioclase Death Star. FOV 2mm, from Rubha a' Chromain, Mull. pic.twitter.com/VKo8P6rkHV
— John Faithfull ππͺπΊπ΄σ §σ ’σ ³σ £σ ΄σ Ώ (@FaithfullJohn) October 1, 2020
via Twitter https://twitter.com/FaithfullJohn
October 01, 2020 at 11:45AM
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