Vintage Avon Faux Purple Amethyst Pendant Necklace Silver Chain and Extender

This is a vintage pendant necklace from Avon, from the 1980s. It features a single, emerald-cut purple gemstone. It's a faux amethyst (dyed cubic zirconia) set in silver. It's on a silver chain. The chain is 16", but it comes with a 3" extender. The chain has a tag that says "Avon" and "NR." The necklace is in very good condition, with minor signs of wear, and it will come in a gift box.