Indian Mountain HG pair from the Callais Collection.
 
Indian Mountain is one of the classic turquoise mines of Nevada. The history is told in Turquoise in America Part Three, 1990-2020.
 
These cabochons weigh and each measure 1cm in diameter. They are not treated and backed. The price is $30 a carat or $324. I have assigned a TG of 81 or HG. The green from Indian Mountain is rare.