Scaphites Ammonite | South Dakota smokey quartz fluorite also hides remarkable fluorescent

fluorite also hides remarkable fluorescent properties only visible under UV light- and is actually the source of our word "fluorescent"

This item is 3” x 3” and weighs 4

This item is 12” x 7” and weighs 40

This item is 2” x 1

semi-translucent calcite crystal that can be found in the Tri-State Mining District

Scaphites Ammonite | South Dakota smokey quartz fluorite also hides remarkable fluorescentScaphites ammonites are extinct cephalopods known for their distinctive shells, featuring a tightly coiled juvenile stage that transitions into a straight, hook like adult body chamber. Found predominantly in Late Cretaceous marine deposits, these marine invertebrates had chambered shells for buoyancy, likely preyed on small organisms, and are important index fossils, with common South Dakota specimens showcasing iridescent shells and prominent ribs.