Delicate antique 10K gold & peridot pendant with GP chain

A very lovely and light piece measuring just about one inch by just over a half inch, with a peridot of 2-3mm in diameter inside a teardrop shape of gold filigree. The bail is an open diamond. The pendant is marked 10K on the back, along with a maker's mark I can't make out. I am including a 17-inch gold tone chain that has no markings. I do have a 10K gold chain available. If you would like to buy the pendant with that chain, let me know in the comments and I will create a new listing.