Natural Magnesite Oval Bead Strands, Dyed & Heated, TurquoiseSize: about 8mm wide, 12mm long, hole: 2mm; about 33pcs/strand, 15.55 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.