Possibly Sterling Silver Diamond Chip and Possibly Peridot Pendant

This is a very pretty pendant that we bought years ago that I just don’t wear so I want someone to enjoy it. PLEASE NOTE: When we bought it, we were told that it was Sterling Silver with a Diamond Chip and a Peridot but I’m not positive about any of those things since we never had it appraised. It could be real or it could be a costume piece but it is really pretty! Pricing a lot lower than I would have if I knew for sure if it was real or not. I could not find any marking on it. This has been used and shows all over wear including scratches, dents and may have other flaws and imperfections since I did wear it in the past. Measurements are approximate and colors may be off because of lighting.