Others have described similar pieces as Edwardian, antique, Art Deco. I believe this pendant and chain are from the 1950s in the style of all of the above. The chain is 10k white gold, and it is the same chain I found on the pendant when I bought them. The pendant is beautiful filigree 10k white gold with camphor glass & a small diamond. The bail is signed “10k” “ESEMCO”. This came from a woman in her seventies, selling her mother’s jewelry, all of which was signed and either silver or gold.