An Art Deco 6.73ct Ceylon sapphire and diamond ring; centring on a cushion cut natural deep blue sapphire, with GSL authentication report no. AA66564 stating no evidence of any heat treatment, flanked by 4 round brilliant cut shoulder diamonds set in platinum, diamonds total approx. 0.28ct, G/H - Si/P1, size N, wt. 5.64g, with copy val. Cert.