This charming 14k solid gold necklace with natural heart opal makes an amazing October birthstone necklace. The beautiful heart shaped cut of the opal truly shows off the beauty of the stone, allowing the rainbow of colors to sparkle through the milky white color. The opal weighs .65 carats, giving it a dainty appearance that is still large enough to get noticed. The heart has a three prong setting that is made of your choice of solid 14k yellow, white, or rose gold. A matching 18 inch rope chain in your choice of gold color is also included with this stunning piece.