i know of no gold occurences in nj ,but the franklin area is know to produce facet quality curundum ruby ,blue and pink.but always keep an open mind to the possibility of gold ,as the apalachian gold belt xtends through jersy , so it is possible.you have said that you have pyrite ,some appalachian gold is assoc . with pyrite and slate ,i do know that there was world class quality slate quarrys in jersy.happyhunting