A cabochon of fossil Ammonite from Sandsea, near to Whitby in Yorkshire, UK.

Known locally as "Snakestone" due to its characteristic patterns, the fossils from this locale date back to the early Jurassic age, some 175 million years ago.

This cabochon displays the characteristic segmented structure of the species, with pale beige-brown segments held in a dark stone matrix.

weight:  58.69 carats
shape:   Freeform cabochon
dimensions:   35.37 x 18.27 x 12.00 mm
treatment:  None