Grima tourmaline and diamond ring, of moderinist design, centring a claw-set rectangular-cut green tourmaline, framed by an openwork surround of stylised match sticks accented with a claw-set brilliant-cut diamond, to a continiously textured graduated hoop, mounted in 18ct gold, size Q, British hallmarks for 1963, signed HJCo for Haller jewellery Company.