These Coro screw-style earrings have fabulous emerald-green rhinestones, and each has a large oval cut, two marquise cut and three chaton cut beauties. Coro is marked on the screw mechanisms, though faint, and there is not any copyright symbols. I believe these earrings are suppose to be in the shape of a bug -- a fly maybe? Though closed-back, there is an enormous amount of sparkle from the rhinestones. A great addition to a vintage Coro collection!