gold ring with blue glass and diamonds

A 14 carat gold ‘au Firmament’ ring set with an octagonal blue glass panel, the bottom and top are curved like a clock gable set with three central cushion cut diamonds, the center stone larger (0.75 ct.) with a border of rose cut diamonds, European, circa 1780.

weight: 12.2 grams
ring size: 18.25 mm. / 8+ US
width: 1 – 33 mm.