Vintage inlay abalone shell butterfly brooch stamped Alpaca Mexico setting

Vintage inlay abalone shell butterfly brooch stamped Alpaca Mexico setting. Has some patina on back but has not been polished. Style: The butterfly design and use of abalone shell are characteristic of vintage Mexican jewelry, often associated with the mid-20th century. Set in a metal alloy known as "Alpaca Silver" or "German Silver," which is an alloy of copper, nickel, and sometimes zinc. MEASUREMENTS 1.75" x 1.5". WEIGHT: 5. 68 grams total weight HALLMARKS: Mexico Alpaca Excellent Pre-owned Condition, see all the pictures as part of the description.