A pair of conch pearl and diamond earrings. Photo Bonhams

Each set with a conch pearl measuring approximately 7.15-8.90 x 5.60mm and 7.65-9.30 x 5.30mm, within a marquise, pear and brilliant-cut diamond surround, mounted in platinum, the diamonds estimated to weigh approximately 4.35 carats in total, earring length 2.0cm. Sold for HK$ 225,000 (€21,757)

Accompanied by a certificate from the SSEF Swiss Gemmological Institute stating that the analysed properties confirm the authenticity of these natural conch pearls, with no indications of artificial colour modification. Report number 65142, dated 19 Sep 2012

Bonhams. Fine Jewellery & Jadeite Hong Kong, Admiralty, 23 Nov 2012