Hey, Elizat! Thank you both.
I think I will take them to the jeweler and see what an appraisal costs (I have one ring worth the appraisal), if it's worth it for the amethyst and aquamarine rings, which I doubt. The local consignment shop might be interested. I can't recall what I paid for them, and I couldn't find the receipts, though I did for the one diamond ring. I will say, based on the single days with a better income, under 500, possibly under 300, but I remember liking them a lot and not caring if they were expensive or not. Ugh...wish I could remember, then I could guess what percentage to sell for. The diamond ring was 1500, so I know I'll only get about 300.
Mrs. McC: both are oval cut (my fav) with diamonds, the amethyst has three little diamonds on top and three below. The aqua is surrounded.