Column Natural Magnesite Beads Strands, Dyed & Heated, TurquoiseSize: about 8mm in diameter, 16mm long, hole: 1mm; about 25pcs/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.