14K Gold Trillion Cut Smokey Quartz Earrings Smokey quartz gemstones are featured in these earrings. The earrings display 2 5 X 5mm trillion shaped natural smokey quartz gemstones and are crafted of 14K solid yellow gold. The smokey quartz stud earrings contain 14K yellow gold post backings for a secure, comfortable fit. Exceptional and captivating style.