Southwestern Sterling Silver Turquoise Screw Back Earrings

Vintage sterling silver Southwestern Turquoise earrings are unmarked and test as sterling silver.  They measure about 3/4 inch by 5/8 inch wide.  They weigh 6.9 grams together and they are in great vintage condition.  These earrings appear to be handmade and the rope edging around one earring is not even.