Vintage Navajo Sterling Silver Ring with Blue Turquoise with Quartz Size 9

Vintage Navajo sterling silver ring with a large blue turquoise stone that appears to have white quartz mottled throughout. The Shank is Simple and cold chisel split. Back of the ring has some messy solder.

Size 9 Face measures 1 1/8" by 1". Weight: 9.6 grams. No hallmarks. Acid tested.