Vintage Mexican Fire Opal Silver Ring

This vintage ring is umarked and is most likely coin silver with an ornate setting framing a extraordinary, sawtooth bezel-set Mexican fire opal. The Mexican opal cabochon has wonderful color flashes, is high-domed and measures 15x8x7mm deep.
This vintage Mexican fire opal ring is in excellent, original and unpolished condition with the setting measuring 5/8 x 1 inch with a triple band and is a size 7.