Rutile
Chemical Formula	TiO2
Species	Oxides & Hydroxides
Crystal System	Tetragonal
Mohs Scale	6
Specific Gravity	4.23
Color	Reddish brown, red, pale yellow, pale blue, Purple, rarely grass-green; black if high in Nb–Ta
Streak	Bright red to dark red
Luster	Adamantine, Metallic
Refractive Index	n = 2.605 - 2.613 n = 2.899 - 2.901
Diaphaneity	Transparent
Cleavage	Distinct/Good distinct, less distinct; and, in traces.
Fracture	Irregular/Uneven, Conchoidal, Sub-Conchoidal
Crystal Habit：Acicular to Prismatic crystals, elongated andstriated parallel
Geological Setting：As an accessory mineral in high pressure, high temperature igneous rocks, in placers.