I have this pic and must have got it from this board. The pic is labelled Jordanian Turquoise and with no other information.
Turning to Field 1997 page 158 I read: "Despite the number of pieces of antique turquoise jewellery in the royal family the Queen owns only one modern set - a cluster-and-drop necklace and matching earrings of turquoises, with diamonds and sapphires, that she was given by the King of Jordan when he paid a State visit to England in 1966. The queen had never worn it in public until she paid a return visit to King Hussein and Queen Noor in 1984; she wore it then at the State banquet they gave in her honour."