The Royal Blue claim, located in the Royston District of Esmeralda County Nevada was first located in the 1890’s. The history is found in Turquoise in America Part Two, 1910-1990.
 
This cabochon weighs 12.9 carats and measures 2.5cm X 1.50cm. It is priced at $60 a carat or $774. It is not treated and is backed. I have assigned a TG of 89 or VHG. This stone shows the characteristic blue in rhyolite matrix associated with Royal Blue. The white spot is camera flash.