A sparkling cabochon of pyritised fossil Ammonite from Lyme Regis, Dorset, England.
The fossil dates to the early Jurassic, some 190 million years ago and was recovered from Dorset's famous Jurassic coast.
The gem displays yellow crystalline cells surrounded with glistening metallic Pyrite.
To see a short video of the cabochon on YouTube, please use this link:
weight: 21.01 carats
shape: Oval cabochon
dimensions: 24.63 x 19.95 x 4.38 mm