Natural Magnesite Bead Strands, Dyed, Round, Dark TurquoiseSize: about 4mm in diameter, hole: 0.8mm; about 100pcs/strand, 15.7 inch.â 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. It is actually Magnesite.