Minerals in PPL

Revision quiz

Classic Type in answers that appear in a list
two pleochroic colours of biotite
sheet mineral with low relief
mineral with undulatory extinction
mineral with a cryptocrystalline structure
two pleochroic colours of chlorite
type of twinning common in plagioclase
twinning across a single plane
angles of cleavage in amphibole
minerals with 90 degree cleavage
minerals which are opaque
pink, moderate relief mineral
what do crystals of the above often contain
colouration of orthoclase, plagioclase and muscovite
extinction type in kyanite
typical angle of the above example
habit of sillimanite
mineral with yellow pleochroism
angle of extinction in orthopyroxene
mineral example of the above
angle of extinction in clinopyroxene
mineral example of the above
colours (non pleochroic) in andalusite
colourless aluminosilicate polymorph

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