Vintage Estate 1.75 Carat Natural Sky Blue Topaz Solitaire Filigree Ring. 925 Solid Sterling Silver. The Top Of The Ring Measures 3/8 Inches, 9.5 mm in Length. Set With One Natural 8x6 mm Emerald Cut Natural Sky Blue Topaz Stone. Stamped 925. Excellent Condition/Like New Vintage Estate 1.75 Carat Natural Sky Blue Topaz Solitaire Filigree Ring in 925 Solid Sterling Silver 782