Fossil Fern | Alethopteris grandini | Kansas Dinosaur This gemstone ranges in color

This gemstone ranges in color from a light

These Seam Agates also known as Vein Agates

Red and green are the most common

The whorls often show a star-shaped or wheel-like appearance in compression fossils

Along with tide and wave actions

Fossil Fern | Alethopteris grandini | Kansas Dinosaur This gemstone ranges in colorAlethopteris grandini Pennsylvanian, Carboniferous Stranger Formation Franklin Co. Kansas Rick Rolater Collection Specimen measures approx. 4" x 1. 5" Matrix measures approx. 8. 5" x 6. 5" x 3" This spectacular fern specimen is very detailed and the preservation is impeccable. Alethopteris grandini is a classic and widely recognizable Pennsylvanian age seed fern (Pteridosperm) commonly found in the Carboniferous coal measures of North America and