Significant ceylon sapphire ring, 18k gold. ring size: approx. 59. ring head dimensions: approx. 21.0 x 21.5 mm. total weight: approx. 11.6 g. a significant ring set with an 8.58 ct. intense blue sapphire from ceylon, surrounded by numerous trapezoidal and brilliant-cut diamonds totaling approx. 3.20 ct. e-f/vvs. expertise: includes gübelin gemstone report from 2010.