Cystoid - Fossil Quality:Staff pick steel-gray

steel-gray

formed by titanium dioxide laced with iron and copper hues

5cm x 8cm x 4cm

Brazilian amethyst is especially prized for its consistent color saturation and clarity

The male cave bears could grow to 3

Cystoid - Fossil Quality:Staff pick steel-grayMined from: Osgood Shale, Napoleon Indiana Era: Silurian Geological Age: Approximately 430 to 428 mya Description: Step back over 420 million years with this rare specimen of Holocystites scutellatus silurian, an extinct marine organism belonging to the cystoid class of echinoderms. Cystoids are close relatives of modern crinoids and sea urchins but had their own distinctive, often geometric body structures. This fossilized specimen, originating from