Vintage Navajo Sterling Silver Turquoise / Variscite Ring Size 5

Vintage signed sterling silver ring by Navajo artist Pauline Claw. It is set with a turquoise stone that I highly suspect is indeed variscite. Face measures 1" by 3/4 and it is a size" 5/ Weight" 8 grams. Hand formed shank with a cold chisel split. Marked Sterling.