Brand / Maker: ESPO (Joseph Esposito) — features the authentic stamped arrow/diamond maker's mark.Metal Purity: 18KT H.G.E. (Heavy Gold Electroplate). This means it has a much thicker, higher-quality layer of genuine 18K gold than standard plating, making it highly durable and tarnish-resistant.Stones: Beautifully milky, opalescent faux-opal cabochons that catch the light wonderfully.Style: Mid-Century, Retro, Atomic, Cluster, Cocktail Ring.Era: Circa 1960s / 1970s.