THIS IS THE THIRD OF SEVERAL ARTICLES THAT ARE MEANT TO INFORM MINERAL MINERS, COLLECTORS, AND AMATEUR SCIENTISTS ABOUT THE GEOLOGIC ENVIRONMENTS OF THE MINERALS THEY COLLECT (previous two: London 2015a, 2016). In these articles, the environment is that of granitic pegmatites. The minerals chosen are those that have much to say about the pegmatitic environment in which they form. The series continues with the lithium-rich minerals.
Dr. David London is a Stubbman-Drace Presidential Professor, Norman R. Gelphman Professor of Geology, and director of the Electron Microprobe Laboratory at the University of Oklahoma.