Michael Berger (1966-) kinetic 18ct yellow gold and tourmaline ring, modernist form with a large baguette cut green tourmaline set the wedge form kinetic swivelling top, brushed polished finish. 27.95gm. With gold mark and maker's monogram. In original monogrammed box. Note: Michael Berger follows in the footsteps of his mentor, Friedrich Becker, noted as an outstanding designer and master craftsman who had a decisive influence the art of the goldsmith in the second half of the 20th century. Berger's hand-made kinetic rings move and spin on the wearer s hand. His studio in the city of Dusseldorf. Provenance: From the Jill Mandeno estate.