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.

Hundreds of 'Rock Crystals' Found From a 6000-Yr-Old Site Indicate Quartz Fragments Were Used to Decorate Graves The burial ...

NASA’s Perseverance rover has uncovered high-purity quartz crystals on Mars, a discovery that could reshape the search for ...

All kinds of hidden gems at the Aiken-Augusta Gem & Mineral Show, so do you know your state gem or your birthstone? Seeing is ...