It is actually Howlite.
7 inch(40cm). Natural Howlite Round Beads Strands.● 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 Round Beads Strands, Dyed, Medium Turquoise, Size: about 6mm diameter, hole: 1mm; about 64pcs/strand, 15.