Gift them a timeless pendant that adds a personal meaning to their jewelry collection. The Cailin Gold Pendant Necklace in Champagne Opal Crystal—an October birthstone-inspired shade—lets you celebrate each years successes and embrace the excitement of whats to come. 14k Yellow Gold Over Brass. Champagne Opal Crystal. 0.37"L X 0.24"W Pendant. 16" Chain With 3" Extender. Lobster Clasp With Single Adjustable Sliding Bead.