Spanish 18th Century Emerald Green Gold Earrings

I've had these in my collection for quite some time. The earrings are gold with emeralds. I think mine have the tops broken off not really sure as I have seen a couple of others that had more ornate tops. The backs show alot of wear, very delicate, never wore them, just open the box about every 3 months and just smile. I love my old jewelry but afraid to wear it.