Dumortierite pendant - Shape: Chinese PI or Donut 40mmDescription of the Dumortierite pendant in the shape of a Chinese pi or donut Made of aluminum borosilicate, this dumortierite stone in a blue color changing from light to dark is a mineral from various countries. There are farms everywhere: France, Peru, Madagascar, Austria, Brazil, Poland... It was discovered in 1880 by a mineral stone collector. It is a powerful serenity stone that will be of great use to you in everyday life. It is a stone that is used for lithotherapy, to make ceramic decorative objects but also for goldsmithery. We make splendid jewelry sets with this rock. The 40mm Chinese IP Dumortierite pendant is proof of this! Always keep it with you, it helps to make your existence easier. It is ideal for those who work in communication, politicians, singers and speakers.