18K Goldplate Ring with Faux? Diamonds

Marked 18k G. E. circleA, this gold electroplate ring has 12 diamonds(?), the thirteenth in the center (for good luck!).  Pretty and glamorous vintage piece, perhaps 1950s, in great used condition.
8.7 grams

My question: What is the likelihood that the diamonds are real in an 18k goldplated ring?