Presenting from our Vintage Estate Jewelry Collection: 18K White Gold Ladies Diamond and Ruby Necklace. A simple necklace can be a tasteful addition to any outfit, but sometimes simple is simply not enough. This ladies diamond and ruby necklace quite literally makes a splash with its flowing raindrop shape that seems to trickle down the neck. It cascades like a fountain of 6.5 carats of diamonds and rubies, while the 18k white gold with yellow gold accents gives it a fiery luminescence. This piece, crafted in 18K white gold measures 16 inches in length is a stunner that will definitely be a favorite.