Vintage 60s 70s Brooch Original by Robert Brass Glass Smokey brown Pin Jewelry

1960s vintage brooch signed "Original by Robert" on back. Knotted rope style heavy gold tone metal setting and faceted brown cut glass center stone. Has a hook and swivel clasp at back to be worn as pin or pendant. Very good quality, heavy, statement piece. Measures: 2 x 2.5" across Condition: Clean, no scratches or other issues vintage jewellery brutalist mcm mid century 1960s 1970s signed piece