Barite
Chemical Formula	BaSO4
Species	Sulfates
Crystal System	Orthorhombic
Mohs Scale	3-3.5
Specific Gravity	4.3-5
Color	Colorless, white, light shades of blue, yellow, grey, brown
Streak	White
Luster	Vitreous, pearly
Refractive Index	nα = 1.634–1.637nβ = 1.636–1.638nγ = 1.646–1.648
Diaphaneity	transparent to opaque
Cleavage	Perfect cleavage parallel to base and prism faces: Perfect, Perfect, Imperfect
Fracture	Irregular/uneven
Crystal Habit：Tabular parallel to base, fibrous, nodular to massive