An Australian 'Lightening Ridge' fire opal pendant, in a handmade 18ct gold mount set with 65. Diamonds. The oval opal, with a good play of colour including strong orange-yellow broad flash-fire with background colours of blue, green and red, is framed by yellow and white gold interlaced 'ribbons' set with. Diamonds, and surmounted by a coronet with three. Diamonds at the points. Opal reported weight 13.88ct