This is a vintage Crown Trifari choker necklace from the "Caravan" collection (specifically the "Ceylon" or "Kashmir" line), dating to the mid-1950s. 

Product Details

• Materials: It features rich, chocolate-brown thermoset lucite cabochons set in a gold-plated metal alloy known as Trifarium, which was patented by the company to be tarnish-resistant.

• Design: The necklace is characterized by scrolled, "pine needle" or leaf-style links accented with clear round and baguette rhinestones.

• Era: This piece is a classic example of Mid-Century Modern (MCM) costume jewelry. The "Crown Trifari" mark typically indicates a production date between the late 1930s and late 1960s.