Assertion: mineral's cleavage | /r/CapableOf | intersect at about 86 degrees
Facets:
Source sentences:
text: Streak White Luster Vitreous, pearly on cleavage faces Diaphaneity Transparent to translucent Cleavage Two directions of perfect cleavage intersecting at about 86 degrees Mohs Hardness 6 to 6.5 Specific Gravity 2.68 to 2.72 Diagnostic Properties Hardness, cleavage (twinning and labradorescence are only shown by some specimens)