One of my all time favourite #corona structures. Sapphirine separated from quartz by layers of orthopyroxene and sillimanite. From the Napier Complex in east Antarctica, of course. Photo credit to Martin Hand. #ThinSectionThursday #hotrocks pic.twitter.com/RlBUjhLcv8
— Chris Clark (@chrisfpclark) May 14, 2020
via Twitter https://twitter.com/chrisfpclark
May 14, 2020 at 08:21AM
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