Mother & Child Pearl Cage with Purple Stone and Peach Pearl

The cage is silver tone and I think it to be sterling, but not sure on it. Real sure the pretty peach pearl is real just not sure what type of pearl it is. The chain is not the chain that should go with this, but, seeing as to how it is the chain that secures the pearl this cheap silver tone chain comes with it. Pretty purple stone am not sure as to if it is a cz or real amethyst. I have researched this for over a month at and have seen none like it what so ever to help me to tell you more. I plan to polish this up and take a better look at it to see if I can locate any markings on it. Just looking right now, I just don't see anything. Not sure of the age or any thing much on this. Guessing most of the way and just being honest.