Vintage agate roadrunner pin

Sterling silver vintage roadrunner pin, or tie tack, with an agate set into the front. Old Pawn. Deep orange and dark brown\black colors in the stone. Stamped sterling and signed by the artist on the back. I am unsure of who the artist was and as soon as I find out I will update this listing. measurements are included in the pics. Fantastic pre-owned vintage condition. please see pics.