The world's oldest rocks are spread across the globe and paint a picture of Earth's turbulent early history. Here are some of ...

Large crystals found in geodes and other rocks are relatively rare ... that they obtain the brilliance and luster that gives them their value. Historically, gems have been divided into precious ...

“We knew from Hubble observations that there must be aerosols—tiny particles making up clouds or haze—in WASP-17 b’s atmosphere, but we didn’t expect them to be made of quartz.

“What’s the difference between these crystals, stones, gems, and rocks?” Are they just different names for the same shiny thing, or are there subtle distinctions between them that matter for ...

Distinctive and rare rock crystals were moved over long distances by Early Neolithic Brits and were used to mark their burial sites, according to groundbreaking new archaeological research. Evidence ...