It is actually Howlite.
● This stone is from Xinjiang, it is known in the trade as Turquoise because of its blue-green hues(dyed treated), similar to turquoise in appearance. Natural Howlite Beads Strands.74 inch.Natural Howlite Beads Strands, Dyed, Round, TurquoiseSize: about 6mm in diameter, hole: 1mm; about 64pcs/strand, 15.