Ilmenite

Lustre: Metallic to submetallic.
Hardness: Mohs 5–6 — about as hard as a steel knife.
Streak: Black.
Habit: Trigonal crystal system.

Colour	Black
Mohs hardness	5–6
Lustre	Metallic to submetallic
Streak	Black
Crystal system	Trigonal
Transparency	Opaque
Cleavage	Absent; parting on {0001} and {101}
Fracture	Conchoidal to subconchoidal
Chemical formula	Iron(II) titanium oxide, {{Chem2\|Fe^{II}TiO3}}
Specific gravity	4.70–4.79

What is Ilmenite?

Ilmenite is a titanium-iron(II) oxide mineral with the idealized formula FeTiO3. It is a weakly magnetic black or steel-gray solid. Ilmenite is the most important ore of titanium and the main source of titanium dioxide, which is used as white pigment in paints, printing inks, fabrics, plastics, paper, sunscreen, food and cosmetics.