Dumortierite is a fibrous variably colored aluminum boro-silicate mineral. Dumortierite crystallizes typically forming fibrous aggregates of slender prismatic crystals. The crystals vary in color from brown, blue and green to the more more rare violet and pink. Dumortierite Quartz is blue colored Quartz containing abundant Dumortierite inclusions. Dumortierite was first describes in 1881 in the Rhone Alps of France and was named for the French Paleontologist Eugene Dumortier. Dumortierite is sometimes mistaken for Sodalite and has been used as an imitation for Lapis Lazuli. Dumortierite can be found in Austria, Brazil, Canada, France, Italy, Madagascar, Namibia, Nevada, Norway, Poland, Russia and Sri Lanka.
Quartz is the second most common mineral in the Earth’s continental crust. It is mainly composed of Silica or Silica based minerals. Although Quartz is known by a variety of names, the most important distinction between types of Quartz is that of macro-crystalline, individual crystals visible to the unaided eye, and micro-crystalline, where aggregates of crystals are only visible under high magnification. There are many forms of Quartz including Chalcedony, Amethyst, Citrine, and Carnelian which are results of mineral impurities or heat treatments.