Humite
ID: 109
Humite
Chemical Formula
(Mg,Fe2+)7(SiO4)3(F,OH)2
Hardness (Mohs)
6-6.5
Crystal System
Orthorhombic
Streak
White to pale yellow
Luster
Vitreous, greasy, resinous
Diaphaneity
Transparent to translucent
Color
Yellow, orange, reddish brown, brownish red, white
Crystal Habit / Mode of Occurrence
Granular, massive, as embedded grains, subhedral to euhedral crystals
Fun Facts
Humite is part of the humite group, which are structurally related nesosilicates.