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Earth lab datasite

Amphibole
Silicate actinolite
hydrous calcium magnesium iron silicate
Ca (Mg Fe)5 Si8 O22 OH2
Scale bar = 1 centimetre
cleavage: Prismatic good
crystal system: Monoclinic
hardness 5.0 - 6.0
relative density 3.0 - 3.4
Cornwall
25 K 9