An 18ct gold single stone diamond wishbone necklace, c.1980, with a diamond set centrepiece. An emerald cut diamond with an estimated weight of 2.90ct, double claw set at the cut corners to a pierced collet at the centre of a wishbone bar. The bar, grain set with a row of graduated eight cut and Swiss cut diamonds, to an integral box chain, with a box clasp, with hobnail decoration. Import hallmark London 1980. Centrepiece 48mm long, 8.73g Accompanied by a report from Gemmological Certification Services dated 24/05/2020, no. 81303-11 with stated grades of: Colour F/G Clarity VVS2/VS1