This 18K yellow gold Kimberly McDonald diamond and opal ring is meticulously crafted in the USA with a slim band and triple embellishment design featuring blue opals and white diamonds. And now it’s time for today’s fun fact: opals are one of the only gemstones found on earth as well as on Mars. While the ones here are from our planet, this does explain why this Kimberley McDonald ring is out of this world.