Baroque Pearl, Purple Sapphire and Amethyst Necklace Double-strand gold chain with bezel-set purple sapphires and diamonds, dropping to a cabochon amethyst, and large baroque pearl encrusted with purple sapphire pavé and white diamond briolettes; in 18-karat white gold. Diamond weight: approximately 2.31 carats total. Purple sapphire weight: approximately 20.42 carats total.