From the  local estate of a lady who bought jewelry online. this is a sterling silver pendant enhancer by Carolyn Pollack featuring a teardrop stone of white agate (30 mm by 25 mm) held in place by swirled prongs on the back.  More swirls on the front with three small, presumably semi precious, stones in  green , pink and blue  colors.  The pendant overall measures  2" high by  1 1/4" wide.  The height includes the large 5/8" bale which opens and closes for use as an enhancer.  The opening is 3/8".  Overall condition is vintage excellent.