Assertion: mica's chemical composition | /r/HasProperty | sio
Facets:
Source sentences:
text: Chemical Composition SiO 2
text: None - typically breaks with a conchoidal fracture Mohs Hardness 7 Specific Gravity 2.6 to 2.7 Diagnostic Properties Conchoidal fracture, glassy luster, hardness Chemical Composition SiO 2 Crystal System Hexagonal