COSTANTINO REPOSSI BEAUTIFUL BALL RING In white gold, set with a large oval-cut "Royal Blue" Burmese sapphire weighing 16.42 cts in a star-shaped setting of eight close-set triangular and baguette diamonds. Signed. In box. A diamond and 18k gold ring set with an oval shaped sapphire weighing 16.42 cts, by Costantino Repossi. Copies of S.S.E.F. and G.R.S. certificates attesting: origin Burma (Myanmar), natural colour ("Royal Blue" by G.R.S.), no heat modification. RC : Dimensions of the stone: 14.25 x 13.15 x 10.45 mm approx. TDD: 53-54, US: 7 (modifble, inner ring). Gross weight: 24.4 g (18k - 750).