Large Vintage Smoky Quartz Sterling Silver Ring

 
Stunning vintage cocktail ring set with a large princess cut smoky quartz gemstone in a raised sterling silver basket mount.  Measuring 25 x 18mms and sitting 11mms above the finger, this is a real statement piece.  With a full set of silver hallmarks and a makers mark of E or F and O or D?  UK size P and US size 7.7.5.  In very good condition