5 février 2018
Rare Opalescent Gem Ammonite, Cretaceous, ca. 75000000 BCE, Alberta, Canada
Rare Opalescent Gem Ammonite, Cretaceous, ca. 75000000 BCE, Alberta, Canada, 16 1/2 × 14 1/2 in, 41.9 × 36.8 cm © ArtAncient Ammonites take their name from their spiral shells which reminded the ancients of Ammon's curled horns. Found throughout the world,...