The pear-shaped amethyst weighing approximately 70.00 carats is partially bordered by a double line, of claw-set brilliant-cut diamonds with marquise-shaped diamond accents to a similarly set bale, the diamonds together weighing approximately 1.80 carats, mounted in 18ct white gold, approximately 50 x 35 mm, signed PM for Percy Marks, hinged bale and pin fittings.