Crystal system: Monoclinic.
Cell salt: Arsenic sulfur.
Colour: Deep red to orange colour (may become yellow upon exposure to light).
Energy: Electromagnetic.
Element: Fire and water.
Planet/sign: Mars-Pluto; Venus-Neptune/Pisces.
Uses: Realgar is an enigmatic mineral because it is simultaneously crude and gentle. It can benefit those who wish to neutralize and refine their sexual energy.