Today's #MinCup24 duell is #Kyanite /#Disthen Vs. #Ringwoodite. I am for several reasons in #TeamKyanite. One is the famous phase diagram: kyanite, #sillimanite, #andalusite. It's so famous even my humans know it
#mineral #MinCup #CatsOfMastodon

It's Thursday, and I feel like one #ThinSectionThursday toot is not enough. So here's a bonus one: #garnet, muscovite and #sillimanite from the Scottish Southern Uplands, in the aureole of the Cairnsmore of Fleet pluton at #Knocknairling near New Galloway. Thermal metamorphism done right! 😊 Field of view 2mm wide.