VTG Fire Opal Pendant, Mexican Signed Jewelry Mexican Fire Opal Jewelry, Opals

Private estate piece. This opal I believe to be synthetic. --- Orange and yellow fire Opal pendant is approximately 1/2 inch in size set in 950 sterling silver. --- Pendant is stamped signed dw or MP 12 PALATZIN 950. The stamp is a bit hard to make out. --- There is some patina I am not going to disturb. A polish cloth is included. --- The opal changes in the light, the dark and at different angles.