Vintage Marquise Smokey Quartz Cocktail Ring in 14K.  This vintage Mid-Century cocktail ring features a 17.50 carat marquise cut piece of smokey quartz set in 14 karat yellow gold. The marquise cut is quite wide which is really nice for this type of stone because it allows you to gaze into the enchanting deep color. The lovely wire work on the basket gives the ring a regal appearance and the stone is set high above the finger to further this.