Georgian ring

While I'm updating on jewelry acquisitions from the last 6 months - here is my birthday present, bought from nalfie.  It's English, 15k gold, tiny rose-cut diamonds, a faceted blue paste, and enamel, circa 1780.  One tiny diamond is missing, but I almost can't tell which,  and I love the little silver star settings. They thought the paste might be an early addition/replacement. And they dated it around 1780/1800. The pics are nalfie's.