Dragons breath ring

This is a dragons breath ring marked sterling.i have no idea what year but was thinking arts n craft since the sterling is hammered and the little hearts on side.Also the ring is closed back so wondering if its foiled im thinking its not foiled as the stone shows strong purple blue and orange colors but I think older dragons breat is in open settings where you can see back of.stone.?? I love the stone and am curious if anyone has dragons breath info to share. Rt