Fluorite
Fluorite forms mainly cubic or octahedral crystals.
Fluorite can appear colorless or in all colors, often also in several
colours must be zonally coloured, the so-called rainbow fluorite.
Its variety of colours is due to the different foreign substances
...to be attributed.
Fluorite is often used for technical and medical purposes.
Fluorite is also very popular as decorative, decorative and healing stone.