Vintage 10k gold shell cameo Art Nouveau brooch

Vintage 10k gold shell cameo Art Nouveau brooch pendant. Can be worn as a brooch or a pendant. Exquisite carving, possibly from the 1920s or earlier. Could be considered an antique piece. Marked 10k on the clasp section. Lovely shell cameo carved woman in profile. I kept it in a box over the years but have not worn it many times. Measures approximately 1.5” by 1 1/8”. Price is FIRM unless bundled with other items.