Formula: (Fe,Mg)7Si8O22(OH)2
Origin of name: From ferrous iron (Fe2+) and anthophyllite
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Grayish green
Diaphaneity: Transparent to nearly opaque
Luster: Vitreous to silky
Habit: Crystals prismatic, massive, asbestiform fibers
Hardness: 5.5 to 6
Specific gravity:
Cleavage: 3; {110} perfect, {100} and {001} imperfect
Tenacity:
Streak: Colourless or greyish
Synonyms/varieties:
Comments: Series with anthophyllite
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