Archaeologists spotted fragments of quartz called 'rock crystal' at the site. The fragments were spread all around but were heavily concentrated in the burial mounds. In all, 337 pieces were ...

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.

Evidence for the use of rock crystal - a rare type of perfectly transparent quartz which forms in large hexagonal gems - has occasionally been found at prehistoric sites in the British Isles, but ...

Oregon's state rock is celebrating its 60th anniversary this year. Here's everything to know about the thunderegg and where ...

Pure quartz crystals have been spotted on Mars for the ... the lake bottom and began climbing the crater’s rim, where the rocks… Receive a weekly dose of discovery in your inbox!