Looks as though the brooch might have a coloured stone but then that could be a quirk of the pic.
--Previous Message-- : In the bottom picture where Queen Mary wears : the waterfall brooch. : What brooch does she wear on her sash? : The William IV brooch? : : --Previous Message-- : : Queen Alexandra is wearing an extra necklace : of diamonds above the collier, and a : pendant. : Queen Mary is wearing three drops on the : collier in the larger pic.