Hard to find vintage Aries theme ring marked ART.   The ring is gold tone and features a very detailed silver tone ram.  The crown has a beaded design around the rim and repousse designs on each side of the shank.  There is a clear rhinestone beneath the ram that has good color.  The ram has a bit of movement but is securely fastened with a rivet.  The ring is currently size 7 but is adjustable.  The crown is .75” across. 

From a smoke free home.  Some photos are enlarged to show detail.  Thanks for looking!