Earth
Why do some rocks sparkle?
Because flat mineral faces can reflect light like tiny mirrors. Minerals such as mica, quartz or pyrite can form shiny crystals inside rocks. When light hits their surfaces, the rock seems to glitter.
Earth
Because flat mineral faces can reflect light like tiny mirrors. Minerals such as mica, quartz or pyrite can form shiny crystals inside rocks. When light hits their surfaces, the rock seems to glitter.