Scaphites Ammonite | South Dakota smokey quartz This item is 3” x

This item is 3” x 3” and weighs 4

this mineral has a silky luster and soothing appearance

This item is 5” x 4” and weighs 1 lb 14

is a metamorphic rock combining vibrant green zoisite

This item is 2” x 1

Scaphites Ammonite | South Dakota smokey quartz This item is 3” xScaphites 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.