1970s Sarah Coventry 12K gold filled agate brooch and pendant

This is a beautiful brooch/pendant by Sarah Coventry. All Sarah Coventry jewelry were made in Rhode Island and this piece is from the 1970s. It is very versatile and can be used as a pendent and a brooch. The center stone is polished genuine moss agate. On the base it is stamped 1/20 12KGF (gold filled) and is in perfect and tarnish-free condition.