Early Petit-Point Turquoise Squash Blossom Earrings Screw Back

Vintage Zuni petit-point turquoise squash blossom earrings. They are screw back style and in sterling silver. Tarnished with a warm patina, but they do have some very old, yellowed caked silver polish and need to be cleaned. 

Measure 1 1/8" long by 5/8" wide. Total weight: 8 grams. No hallmarks. Acid tested sterling. C. 1940s.