Antique Lavaliere Cameo Pendant Necklace Either shell/coral hand carved w/Pearl

Antique Lavaliere Cameo Pendant Necklace Either shell/coral hand carved w/Pearl drop From the research I’ve gathered it states this piece is hand carved coral but I can not be sure of that. The Pearl is not smooth it is gritty against other pearls. This is an Antique piece and does show signs of wear. Please view the pictures as part of description. This piece is signed but cannot make out the letters. If anyone has more input please GM feel free to message me on this one. Thank you.