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Earth lab datasite

Cronstedtite
Silicate in sulphide vein
hydrous iron silicate
Fe8 Si2 O10 OH8
Scale bar = 1 centimetre
cleavage: Perfect
crystal system: Monoclinic
hardness 3.5
relative density 3.3 - 3.5
Wheal Jane, near Truro, Cornwall
25 L 8