This is a delicate and lovely antique Edwardian pendant or lavalier in 10K gold set with a tiny diamond and accented with a cultured pearl drop. It is marked 10K on the bail.
It measures about 1 1/4 inches long, including the bail and it is about 1/2 inch wide. It is in very good condition. It does not include a chain, however I have a contemporary gold filled chain that I can include if desired.