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This collection consists of approximately 20 smooth, water-worn pebbles and small cobbles, likely sourced from a South Carolina riverbed or coastal plain. The stones range in color from milky white and translucent cream to honey-yellow and smoky gray, with occasional iron staining (the reddish-brown patches).
Their rounded edges indicate they have been naturally tumbled by water over a long period. Many of these appear to be Quartz or Chalcedony, which are abundant in the Piedmont and Coastal Plain regions of South Carolina.Why Do They Glow?
Finding \"glow rocks\" in South Carolina is a thrill! Since you mentioned they react to UV light, here are the likely candidates:
Calcite-Included Quartz: While pure quartz doesn\'t usually glow, quartz with Calcite inclusions or coatings often fluoresces red, pink, or orange.
Chalcedony/Agate: These can sometimes glow a dull green or yellow due to trace amounts of uranium or other minerals trapped during formation.
Petrified Wood: South Carolina has significant deposits of petrified wood. If the wood has been \"silicified\" (turned to stone by silica), it can sometimes exhibit a strong neon green or yellow glow under short-wave or long-wave
