The mineral known for its bright red color is cinnabar, which is primarily composed of mercury sulfide (HgS). Cinnabar is notable not only for its striking hue but also for its historical significance as the primary ore from which mercury is extracted. In ancient times, it was used as a pigment in art and cosmetics, and its bright red color made it a sought-after material in various cultures. However, due to the toxicity of mercury, the handling of cinnabar should be approached with caution. Today, the use of cinnabar has declined due to safety concerns and the availability of safer synthetic pigments.