This phenomenon is not uncommon. Voids inside the eggs can be filled by calcite and quartz crystals, resulting in geode-like ...

Geodes, for instance, are created when mineral-rich water seeps into hollow spaces within rock formations and slowly evaporates, leaving behind dazzling crystals like quartz and amethyst.

Associated with the fresh flush of first love and new beginnings, Moonstone supports the Heart Chakra, Third Eye Chakra and ...

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.

They submerged quartz crystals in a gold-rich fluid and applied ... with quartz veins found in tectonically active areas or even rocks shattered by earthquakes. “In essence, the quartz acts ...

The world's oldest rocks are spread across the globe and paint a picture of Earth's turbulent early history. Here are some of the most notable and important formations scientists have discovered.

Large crystals found in geodes and other rocks are relatively rare. Pink ChalcedonyA pink chalcedony shows off its beauty. Chalcedonies include many types of cryptocrystalline quartz gems and ...

More than one of our readers suggested we highlight this beautifully-shot process documentary about the laborious and precise manufacturing of piezoelectric quartz crystals in the early 1940s.

Melted Rock These pieces of once-molten rock ... Some scientists maintain that the fracture pattern in these quartz crystals could only have been caused by a massive asteroid or comet impact.