Tested 6 ct Black Emerald and Black Spinel ring in SS 925 silver US 7.5 fit 7 8

Tested Black Emerald (3 carats & about 8 mm in diameter) and Black spinel ring (small cluster 3 ct in total) in SS 925 silver US 7.5 fit 7 8 The jeweler's test showed the main large stone to be black emerald and the small stone cluster to be black spinels set in 925 sterling silver, marked as such Size 7.5 for best fit, but will fit all from 7 to 8; 8 will be a very tight fit