Indian Mountain is on Bald Mountain in Lander County Nevada. The history is found in Turquoise in America Part Two, 1910-1990.
 
This cabochon weighs 20.2 carats and measures 3cm X 1.75cm. It is priced at $90 a carat or $1818. It is not treated and is backed. I have assigned a TG of 91 or GG. It shows the dark web look for Indian Mountain.