Natural Magnesite Beads, Gemstone Sphere, Dyed, Round, Undrilled/No Hole Beads, Gemstone Sphere, Sky BlueSize: about 4mm in diameter..â This stone is from Xinjiang, it is known in the trade as Turquoise because of its blue-green hues(dyed & heated), similar to turquoise in appearance. It is actually Magnesite.