Top: Corinthian Silver Stater with Pegasus (mid 4th Century BC) set with cabochon sapphires. 

Left: Hellenistic Silver Tetradrachm of Lysimachos of Thrace (305-281 BC). Posthumous deified portrait of Alexander the Great. 

Right: Athenian Greek Silver Tetradrachm (after 449 BC). Set with a cabochon sapphire.