Vintage 925 Sterling Silver Four Interchangeable Gemstone Earrings

Vintage 925 sterling silver four interchangeable gemstone earrings. They are approximately 1 3/4” and there are four sets of earrings that can be changed. They all have a freshwater pearl dangling on the bottom of each pair. These earrings are for pierced ears. The genuine gemstones are turquoise, lapis lazuli, carnelian, and malachite. I believe that is the name of all the gemstones. On the back it has the 925 on them but I don’t remember the name of the company that they are. I actually have two sets of the same ones because originally my mother and I bought these off of QVC many years ago and I have her set and I have my set that I am selling. Both identical. Each set is $50.00. They are really pretty and in excellent condition. They come from a smoke free home and there are no returns.