A gemstone, pearl and diamond brooch, early 20th century, of bar design, set with circular-cut

A gemstone, pearl and diamond brooch, early 20th century, of bar design, set with circular-cut diamonds, each end capped with a pearl, suspending a sequence of six circular cut stone pendants: a sphene, a light blue sapphire, a pink spinel, a green tourmaline, a deep blue sapphire and an emerald, mounted in silver and gold, length 5.2cm, fitted case stamped Garrard