Courtland-Gleeson Turquoise Solitaire Ring | Sterling Silver | Vintage c.1970's

A Bit About The Piece
Vintage 1970’s sterling silver ring bezel-set with a bright blue turquoise stone from Courtland-Gleeson Mining District, Arizona.  The stone has a black webbed matrix with subtle darker blue veining; a crack runs through the top of the stone through what appears to be a matrix plane.  This may either be natural or the result of wear.
 
Details, details…
The Stone: Turquoise, natural
stone count: 1
origin: Courtland-Gleeson Mining District, Arizona
cut: parallelogram cabochon
stone measurements (millimeters): 32.39mm x 8.76mm
stone measurements (inches): 1.3″ x 0.33″
treatments: not dyed, stabilized
The Setting: Handmade Solitaire Ring
metal: .925 sterling silver, solid
top of ring width: 38.09mm (1.5″)
height of ring from finger: 5.58mm (0.2″)
bottom of shank width: 5.03mm
ring weight: 8.07 grams
approximate default ring size: 4.75
era: circa 1970’s