Rare Campbellite Red Stone Vintage Ring Old Pawn Size 6. JR 770

Rare Campbellite stone with its deep reddish brown color featured on this vintage Native silver ring. Campbellite is mined where they mine Bissbee turquoise.
Good old condition, great patina.
Tested Sterling and unmarked like many of the oldies.
Original size never altered.
The ring is size 6 and weighs 8 grams. C 1960s
Inventory #JR 770