A pink sapphire and diamond brooch, by Michael Gosschalk, 1970Of floral design, the openwork ropetwist petals centrally set with a cluster of cushion, old brilliant and single-cut diamonds, accented by oval-cut and cushion-shaped pink sapphires, mounted in 18 carat yellow gold, diamonds approx. 3.50cts total, maker's mark MG, French export marks, London import mark, length 6.7cm注脚Accompanied by a report from The Gem and Pearl Laboratory stating that two of the pink sapphires weighing 1.17 carats and 0.54 carat were tested and found to be natural, of Burmese origin, with no indications of heat treatment. Report number 17346, dated 10th June 2019.