Opal and diamond pendant-brooch The oval opal measuring approximately 32.0 by 27.0 mm., framed by round and baguette diamonds, surmounted by a round and a triangular-shaped diamond, altogether weighing approximately 4.60 carats, mounted in platinum; together...

An opal and diamond pendant on chain The polished opal matrix in brilliant-cut diamond set precious white metal foliate mount, to a 9ct white gold box-link chain. Estimate: £400 - 500 Bonhams. Jewellery, 20 Jan 2009. Oxford (Copyright © 2002-2009 Bonhams...

An opal, emerald, ruby, sapphire and diamond cluster ring Centrally set with a cabochon opal surrounded by emeralds, rubies and sapphires within a further border of brilliant-cut diamonds, ring size O. Estimate: £1,000 - 1,500 Bonhams. Jewellery, 14 Jan...