This year, the event runs Fridays and Saturdays through Dec. 21. The cave originally began as a white quartz gravel mine, a part of the Sharon Conglomerate geologic layer. According to its website ...

These rocks are extracted from the ground and turned into quartz gravel, which is then processed into a fine sand. The silicon is separated from other minerals and then goes through a final milling.

This silt, sand and gravel is transported variably by suspension in the ... Researchers using NASA's James Webb Space Telescope have detected evidence for quartz nanocrystals in the high-altitude ...