Chinese turquoise was among the earliest mined. The story of the introduction of Chinese turquoise to the US market is told in Turquoise in America Part Two 1910-1990 in Chapter Five “First Contact”.
 
This cab weighs 17.7 carat and measures 2cm X 1.5cm X 8mm and is priced at $20 a carat or $354. It is not treated and is not backed. I have assigned a TG of 82 HG. This shows a rare green dark web look. I bought the rough from Yuki Wang and cut the stone. White spot is camera flash.