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The marquise-cut diamond engagement ring is a piece designed for a special woman with unique tastes. It’s a shape that’s not as commonly seen in the engagement ring world, particularly compared to other styles. That said, the marquise-cut diamond is nothing if not vintage. In fact, the first marquise-cut diamond dates back all the way to the 18th century, when King Louis XV commissioned a jeweler to create a cut that would capture the lips of his mistress. One particularly noteworthy feature of the marquise-cut diamond is how beautiful it looks on. Regardless of your loved one’s hand shape, marquise-cut diamonds have the effect of making the wearer’s fingers appear longer and more slender. Be sure to check out all of Costco’s marquise-cut diamond engagement rings, then take a glance at our beautiful collection of diamond bands. If you’re looking for a unique ring for that one-of-a-kind woman, you’re sure to find it at Costco.com!