Triangular Blue Dumortierite NecklaceThis Sterling Silver and triangular blue Dumortierite pendant is on a Sterling Silver adjustable box chain, that sparkles from every angle. Blue Dumortierite is a natural stone, it has not been enhanced or dyed. It is usually formed as inclusions in Quartz. That's where its beautiful blue hue comes from. Where most of this type of Quartz is found is over in eastern France. But it can also be found in Nevada, Colorado, Washington, Russia, Madagascar,