Pure quartz, or “rock crystal” from Brazil. Source: Didier Descouens, CC BY-SA 4.0 Pick up a rock almost anywhere on Earth and chances are pretty good that there’s at least some quartz in it.

pure quartz crystals embedded in Martian rock. This is the first time such crystals have been found on the red planet. According to the NewScientist, quartz is a mineral commonly found on Earth ...