The unassuming object to the left is actually the world's oldest pearl, unearthed by French researchers at a Neolithic site in the Arabian Peninsula:
Discovered in the Emirate of Umm al Quwain, United Arab Emirates (UAE), the pearl was believed to have originated between 5547 and 5235 BC.
"Gemmologists and jewellers have popularised the idea that the oldest pearl in the world is the 5000-year-old Jomon pearl from Japan. Discoveries made on the shores of south-eastern Arabia show this to be untrue," Vincent Charpentier, Sophie Méry and colleagues at the French Foreign Ministry's archeological mission in the UAE, wrote in the journal Arabian Archaeology and Epigraphy.
http://www.amnh.org/exhibitions/pearls/marine/fossil.html