A pink tourmaline, demantoid garnet, seed pearl and diamond pendant

A pink tourmaline, demantoid garnet, seed pearl and diamond pendant, circa 1910, the drop-shaped pendant set with a pear-shaped pink tourmaline within a wreath of rose-cut diamonds and circular-cut demantoid garnets, bordered by half pearls, mounted in gold and platinum, pendant length 3.9cm, to a later gold chain, length 54cm, Italian maker's marks