Anatase
Chemical Formula	TiO2
Species	Oxides & Hydroxides
Crystal System	Tetragonal
Mohs Scale	5-6
Specific Gravity	3.79-3.97
Color	Black, reddish to yellowish brown, dark blue, gray
Streak	pale yellowish white
Luster	Adamantine, Metallic
Refractive Index	n = 2.561 n = 2.488
Diaphaneity	Transparent, Translucent
Cleavage	Perfecton and
Fracture	Sub-Conchoidal
Crystal Habit：Pyramidal (crystals are shaped like pyramids), tabular (form dimensions are thin in one direction).
Geological Setting：Usually secondary, derived from other titanium-bearing minerals. In alpine veins, derived from the enclosing gneisses or schists by hydrothermal solutions. In igneous and metamorphic rocks; in pegmatites; from a carbonatite. A common detrital mineral.