Flourspar
Fluorspar or Fluorite is a mineral composed of calcium fluoride (CaF2).

Fluorspar is recognised as a strategic mineral and is mined for the production of Calcium Fluoride (CaF2).
Fluorspar comes in a wide range of colors. The most common colors are purple, blue, green, yellow, or colorless. Less common are pink, red, white, brown, black, and nearly every shade in between