Silver Filigree David's Harp Necklace with Roman Glass

This beautiful silver filigree 1" high by 7/8" wide King David's Harp is a unique piece with a 3/8" round setting of Roman glass in the center.  The frame has sterling silver filigree placed on a sterling silver frame. 

The ancient shards were unearthed by archeologists in Israel while looking among Roman ruins.