Gold plated ring and bracelet set adorned with real Pearls and Red Agate. Laguna Agate is located in the remote mountain range in the state of Chihuahua, Mexico. Before the advent of cultured pearls, the Persian Gulf was at the centre of the pearl trade and it was a source of wealth in the region long before the discovery of oil. ... According to legend, Cleopatra crushed a pearl into a glass of wine to prove to Marc Antony that she could give the most expensive dinner in history!