An art deco ruby and diamond brooch, circa 1925.  Photo Bonhams

Centring upon a collet-set circular-cut diamond, the pierced plaque millegrain-set throughout with circular-cut diamonds, the scrolling shoulders accented by calibré-cut rubies,diamonds approximately 3.30 carats, width 5.3cm. Lot 138. Estimate: US$ 8,800 - 11,000. Unsold

Bonhams. 27 May 2012 4 p.m. Sydney, Byron Kennedy Hall. Fine Jewellery