Scaphites Ammonite | South Dakota smokey quartz these specimens are generally considered

these specimens are generally considered safe to handle because the radioactivity is trapped within the silica structure

A unique piece of wearable deep-time history

25" and weighs 2

this mineral has a silky luster and soothing appearance

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

Scaphites Ammonite | South Dakota smokey quartz these specimens are generally consideredScaphites 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.