14k Gold Art Nouveau Seed Pearls, Diamond & Sapphire Lavaliere

For sale is this circa 1920, 14k yellow gold with white gold trim seed pearls, diamond and sapphire lavaliere. The lavaliere measures 1 7/8" long and has twelve round seed pearls and seven 1/2 seed pearls. At the top is a nice blue sapphire and dangling from the bottom set in a white gold basket setting to show the brilliance of the clean, white color is an 0.05 point diamond. The pendant hangs from a sturdy 14k gold 20" long chain that has one tiny repair that is hardly noticeable. Entire piece weighs 3.1 grams. I originally thought that this was a single earring converted into a pendant, but looking closely at the loop on back, I don't believe it was. The back of the piece has a consistent patina all over. No missing, damaged or cracked pearls, diamond is clean and white, sapphire is clean and white.