Perovskite

Formula: CaTiO3 simple oxide
Specific gravity: 3.98 to 4.26
Hardness: 5½
Streak: Colourless, greyish white
Colour: Dark brown, black, red-brown, yellow shades
Solubility: Insoluble in hydrochloric and nitric acids; slightly soluble in sulphuric acid
Environments:

Plutonic igneous environments
Carbonatites
Metamorphic environments

Perovskite is an accessory mineral in silica-poor rocks, such as nepheline syenite, kimberlite (common) and carbonatite. It also occurs in calcareous skarn.

Common impurities: Fe,Nb,Ce,La,TR