Habit: Cubic: cubes and interpenetrant twins
Hardness: 4 to about 4.5
Cleavage : Perfect octahedral
Specific Gravity: 3.18
Color: Greens and blue sperdominate :yellow and pink also found : bicolour: banded violet   and white
Lustre: Vitreous: pearly on cleavage surfaces
Refractive index: 1.43
Diaphaneity: Transparent
Other features: Fluoresces blue or violet. Blue John insert. Color from color centers .
Name: From its use as a flux from the Latin
fluere{ to flow}
Fluorite is found in veins with lead and silver
ores or in pneumatolytic deposits  with cassiterite.