Lone Mountain is an iconic turquoise mine in Esmeralda County Nevada. First located in 1923 the story of Lone Mountain is found in Turquoise in America Part Two, 1910-1990.
 
This cabochon weighs 17.6 carats and measures 2.5 cm 1.5cm. It is priced at $150 a carat or $2640. It is not treated and backed I have assigned a TG of 94 or GG. I bought this from Alan Voishard, the son of Georgia Loloma. It comes from the Loloma Collection and is a very rare an important turquoise.