A collection of 19th century turquoise and diamond jewellery and a turquoise and diamond ring and pair of earrings 1st: Circa 1860, the circular gold brooch centrally set with a cluster of turquoise cabochons, with ropetwist and applied wirework decoration, a glazed compartment to the reverse, 2nd: Early 20th century, the three oval turquoise cabochons on a rose-cut diamond bar, mounted in platinum and gold, 3rd and 4th: Of cluster design, set with oval turquoise cabochons and brilliant and rose-cut diamonds, one rose-cut diamond deficient, lengths: 1st 3.4cm, 2nd 3.3cm, 3rd 1.1cm, ring size approx. J (4) For further information on this lot please visit Bonhams.com