Ross Simons sterling silver ring lot enamel insect, stones retail onyx & prisolite

Product Name: Ross Simons sterling silver ring lot enamel insect, stones retail onyx & prisolite
Ross Simons Sterling Ring Amethyst, Prasiolite, & Onyx, Enamel Insect Ring Sz 10. Not sure if it's a moth, dragonfly, or other flying insect??? I believe it looks to have some enamel missing in places?? But it looks like a stain glass effect, so not noticeable if it is. (I have seen another ring look just retail like the enamel on this ring, so probably intentional?.) Please review photos for details and you decide if that is a problem before purchasing. So as is, in as is condition. Used. Stone's description and sizes are best guess, I don't have a way to test them and I don't have calipers to measure exactly. May have scratches and scuffs due to being a used it. Thanks for looking,.