Mojave Purple Turquoise Ring in Sterling Silver Size 11

Vintage cast sterling silver ring set with a lovely Mojave purple turquoise stone. Size 11. Measures a little over 1/2" wide. Marked 925 inside. 

Mojave purple is a composite stone made of real turquoise pieces that are dyed purple and compressed into a cabochon. The matrix is made of brass. This one has pyrite in the matrix as well. You will see some turquoise color showing through the purple. That is where the stone was harder and the dye did not penetrate as well creating a shadowed look.