Sterling Silver ring with large green gemstone in prong setting. Setting needs to be adjusted because the gem is slightly loose. 

Size: 6.75
Gem: Unknown. Green gemstones. This was tested using the Presidium Gem Tester and fell in the center of " Chrysoprase, emerald, Nephrite". Unable to confirm stone.  
Gemstone measurement: Oval gemstone measures approximately 18mm X 13mm
Total weight: Approximately 5 grams
Hallmarks: Sterling Silver L.S.P. 
The previous owner shopped on HSN so this item was likely purchased from a home shopping channel