Turritella Agate Cabochon with dramatic markings

Turritella Fossil is also called Turritella Agate and Elimia Agate.  This Turritella Fossil cabochon in a pear shape measures 19.3mm wide by 33.1mm long.  There is a druzy hole lined with some glittery druzy just above the lower arc line. Turritella Agate meaning: Despite its name, Turritella agate is not made of fossil snails of the genus Turritella. This has been realized by professionals and many amateurs for a long time, but the name (and the confusion it promotes) have persisted. The snails are actually properly referred to as Elimia tenera, in the family Pleuroceridae.  The rock in which they are so abundant varies from a soft sandstone to a dense chalcedony.   Turritella Agate is also called Turritella Stone Elimia agate comes from the Green River Formation in southwestern Wyoming, northeastern Utah, and northwestern Colorado, from layers deposited in an series of ancient lakes that geologists call Lake Gosiute and Lake Uinta, in the early and middle parts of the Eocene Epoch,