Egyptian turquoise was discovered as early as 3000 BC and has long been a presence in the US market. Information is available on the turquoiseinamerica.com Blog in the video Update on Egyptian Turquoise from March 2023. Natural Egyptian at the higher grades has become very rare.
 
This cab weighs 15.8 carat and measures 1.5cm diameter X 7mm dome. It is priced at $50 a carat or $790. It is not treated and not backed. I have assigned a TG of 91 or GG. I purchased this cab from Hossam Mohamed Khalil who bought from the miners. White spot is camera flash.