Vintage 925 Native American sterling silver&turquoise snake eye clip on earrings

Vintage Native American sterling silver&turquoise Zuni snake eye clip on earrings. they measure just about 3/4" from top to bottom. I believe the turquoise is sleeping beauty because of its even and solid bright blue color, which is a highly sought after type of turquoise. snake eye earrings were made by the Zuni tribe. they are signed by the artist, but the hallmark is difficult to makeout. I believe it reads signed "DA". and of course they are 925 sterling silver.