Ilmenite

Physical Properties
Chemical formula FeTiO3
Class Oxide
Crystal system Hexagonal (trigonal)
Habit Tabular
Prismatic
Often tabular forms
Massive
Granular
Compact
Scaly
Skeletal crystals
Color Iron-black
Hardness 5.5 to 6
Specific gravity 4.5 to 5
Cleavage None
Fracture Subconchoidal
Luster Metallic
Transparency Opaque
Streak Brownish red to black
after Perkins, 372

Ilmenite in Hand Sample

Ilmenite

Ilmenite in rutilated quartz

Ilmenite in slabbed nelsonite

Ilmenite in uncut nelsonite

Further Reading

Ilmenite at webmineral.com

Ilmenite at mindat.org