#ThinSectionFriday Today I came across this cute little crystal: brown allanite core with bright epidote overgrowth, in retrogressed plagioclase, in #Lewsisian gneiss sample from summit of Dun I, on Iona. FOV ca. 0.5mm. Yet another wonder from the @Hunterian collections 🤩 pic.twitter.com/dEm1Wj8MCv
— John Faithfull (@FaithfullJohn) January 18, 2019
via Twitter https://twitter.com/FaithfullJohn
January 18, 2019 at 09:57PM
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