Pearl and diamond bow brooch (pictured top), Cheffins, Cambridge, November 24, estimate £300-500.
Pair of late Victorian silver, gold, rose-cut diamond, emerald and pink sapphire lizard brooches, Kinghams, Moreton-in-Marsh, November 18, estimate £400-600.
Mid-16th century gold ring set with polished diamond crystal, acquired from Michael Denton, Portobello Road in the late 1980s, TimeLine, Harwich, Essex, on November 29, estimate £6000-8000.
Late Georgian gold ring set with cherry amber and seed pearls, Leighton Hall, Alton, November 26, estimate £600-1200.
Art Deco platinum old-cut diamond openwork panel brooch with an estimated total diamond weight of 10.25ct, Fellows, Birmingham, November 24, estimate £8000-12,000.