Dumortierite is better known in the massive form, making as attractive violet and blue decorative stone when polished. Reddish brown and red varieties also occur. Prismatic crystals bigger than 1mm are extremely rare. Demortierite can also be found Intergrown with rock crystal (colourless quartz), and it is then called dumortierite quartz. These components is generally cut en cabochon or polished to create decorative stones. Most gem-quality material can be found in Nevada (USA). Other localities include France, Madagascar, Norway, Sri Lanka, Canada, Poland, Namibia and Italy. Dumortierite was named following the French scientist, M.E. Dumortier.
