This is a hand-crafted pendant by Sue Gifford Knopp on opalescent and deep turquoise enamels embellished with a bezel-set opal and embedded flakes of gold foil. It shifts from pinkish to opalescent blue hues, depending on the light (blueish outdoors, pinkish in sun and incandescent light). It is made of sterling silver, signed, and vermeil and is in good condition. I see a tiny crack in the opal. It measures 1 and 3/4 by1 inches and the bale will take a fine chain or a 3/8" collar. All Sue's enamels are special.