Dumortierite in Quartz 7

 

This plate of Dumortierite in Quartz from Brazil features fully terminated Quartz points atop a bed of blue Dumortierite and numerous miniature quartz crystals are sprinkled across the base. It weighs 89.2 grams and is 3" x 2" in size. Highly unusual, this Aluminum Borate Silicate mineral is seldom seen in its natural form.