littlemisslava: Pegmatite! Yet another Southern Norway sample,…

littlemisslava:

Pegmatite!

Yet another Southern Norway sample, this granite pegmatite is a specimen I haven’t seen the likes of before. As pegmatites usually have very large crystals up to 10′scm across, but as this sample is a granite, I was expecting more quartz or feldspar crystals, rather than the huge sheets of muscovite mica this sample has! Pieces of muscovite keep flaking everywhere whenever I move this sample, so it is now confined to a box where it can stop making a mess!

Geology Nerd

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