Dimetrodon Vertebra | Texas fluorescent Silica spheres refract the light

Silica spheres refract the light and cause the magnificent spectral colors you see in the opal

This stunning crystal has many beautiful terminated points

Annularia sphenophylloides is the foliage (leaf whorls) of the extinct Calamites

Carsten & Knötschke

Dimetrodon Vertebra | Texas fluorescent Silica spheres refract the lightDimetrodon sp. Permian Nocona Formation Archer County, Texas Specimen approx. size: 17mm x 11mm x 9mm Comes in an 1. 25" acrylic case One of the most notable characteristics of Dimetrodon is the large sail on its back, created by long spines that stretch out from its vertebrae. This creature walked on four legs and had a curved skull with a variety of large teeth of different sizes lining its jaws. Its distinctive sail may have served to stabilize its