1930s/1940s Mexico silver and green onyx screw on drop earrings

Pretty 1930s/1940s deco style Mexico silver and green onyx screw on dangle earrings. These vintage drop earrings have beautifully detailed silver work and are hallmarked "Silver Mexico." Earrings are in excellent vintage condition. "Mexico Silver" or "Silver Made in Mexico" marks are seen on pieces from the 1920s through the mid-1940s. The silver standard varies, but it is commonly above .925 purity. Measurements (approximate): see last image