A mid-19th century lava cameo bracelet, circa 1870 © 2002-2009 Bonhams 1793 Ltd.,

The six cameos, produced in different coloured lava, carved to depict portraits of Renaissance artists, to include Raphael, Giotto di Bondone, Antonio Correggio and Salvator Rosa, their names in Italian engraved on the back of each cameo, one metal connecting link deficient, length 16.5cm., cased. Estimate: £500 - 700

Bonhams. Jewellery, 10 Feb 2010. Knightsbridge www.bonhams.com