***Unique Piece*** PEN-ORTHARG-05 Origin: Morocco Grade: AAA Dimensions: 42mm with the bail Weight: 6g Origin: Morocco Grade: AAA = extra (best possible quality) Very beautiful pendant in 925 silver composed of an orthoceras cabochon measuring 28mm x 13mm. Unique piece = you receive the model in the photo. Orthoceras lived during the Paleozoic era, from the Ordovician about 470 million years ago until the end of the Permian when they disappeared during the great Permian-Triassic extinction about 252 million years ago. Orthoceras were univalve-shelled cephalopods, like their distant cousins the nautiluses today, but the shell of orthoceras was straight, hence their name.