Georgian Navette Urn Mourning Ring "Not lost but gone before"

Beautifully preserved Georgian era mourning ring. Unlike most rings of this sort, the urn is formed out of gold and laid on to a ground of dark fabric. More common versions feature plaited hair.  The crystal is in bright clean condition. The hand engraved sentiment reads "Not lost but gone before." English in origin, circa 1790. 
Size 7, can be sized.