A striking artisan opal set gold brooch by Gary Bradley, 18ct yellow gold, handwrought and fully hallmarked by Gary Bradley of Melbourne, presented as a modernist bar brooch measuring 40 x 18 mm, featuring to one end a solid pear cut opal measuring 16.9 x 10.9 mm, strong blue and green in colour with flashes of orange, bezel set in an open backed mount, flanked by a large panel of textured gold, reminiscent of shale with a fissile structure, fitted with pin.