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

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

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