Gorgeous Avalon SS filigree signed ART/Guad .925 pin-pendant

This stupendous pin has a beautiful eye shaped bezeled Avalon cabochon, which is delicately surrounded by scrolling filigree designs set over .925 SS. This mesmerizing brooch is measuring about 2 3/4” Signed ART, Guad, perhaps short for Guadalupe??? There’s also an illegible stamp next to the pin’s closure, which looks like a faded eagle. It’s Vintage and can be worn as a pin or a pendant. Very attractive and color changing depending on the lighting.