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Earth lab datasite

Mica
Silicate lepidolite
hydrous potassium lithium aluminosilicate
K2 (Li Al)5 (Si3 Al O10) (O H F)4
Scale bar = 1 centimetre
cleavage: Perfect basal
crystal system: Monoclinic
hardness 2.5 - 3.0
relative density 2.8 - 3.3
Cornwall
25 L 2