Vintage Mexican sterling silver brooch featuring a pre-Columbian style face / deity design with hammered and chased detail work. Center is set with a rough natural emerald crystal. Marked “SILVER” on back which dates this to approximately the 1930s-1950s period before Mexico commonly used the 925 standard mark. Measures approx 1 1/8 inches across. Beautiful patina has been left as found. Rare older Mexican silver example.