Vintage French Bone brooch

Beautiful, vintage White Bone China brooch, surrounded by goldtone edging. Back of brooch is stamped FRANCE, but the pin bar has obscured the word above it. Is it Lamoges? The pin clasp also has a circular part on top alowing you to also wear this as a necklace. Simply add your favorite thin gold chain and viola' - you have a beautiful necklace! Beautiful piece from my family collection.