Top: Hellenistic Silver Tetradrachm of Myrina (ca.160 BC), with the head of Apollo Grynion. Set with a cabochon emerald.

Left: Hellenistic Silver Tetradrachm of Ptolemy V (204-180 BC). Set with cabochon sapphires. 

Right: Athenian Greek Silver Tetradrachm (after 449 BC), with the head of Athena. Set with a cabochon sapphire. 

Lower: Corinthian Silver Stater (ca. 330 BC), with the helmeted head of Athena. Set with four cabochon sapphires. 

Bottom: Republican Roman Silver Quadrigatus with Janus He