"This Orthoceras Plaque-hand-polished to show the amazing organic structures of the animals-are preserved in black marble and white calcite in an etched matrix of the same material. Orthoceras are extinct cephalopods that lived in the ocean which once covered the Sahara Desert about 400 million years ago(during the Devonian Period). These Plaques, with their dramatic black & white coloring, are very popular pieces for both home design & geological collections." Location: Sahara Desert, Morocco Size: 44.5 x 35.6 x 5 cm. Weight: 22.5 lbs. Quantity Available: 1 Price: $85.00 |