Antique Old Mine cut diamond solitaire engagement ring

Antique Old Mine cut diamond solitaire engagement ring in 18kt yellow gold. Centred with an estimated 0.60ct cushion shape Old Mine cut diamond in a raised platinum claw setting, set to either side with four vertically set round old cut diamonds in rubover settings, further flanked by two vertically set rectangular baguette cut diamond in rubover settings and terminating to two round old cut diamonds in rubover settings, to a flanked solitaire design with curving claws, polished borders and structured openwork gallery, met to either side with slighlt inwardly tapering shoulders which smooth to a solid shank. Marked 18kt gold.