Quartz Crystal Mineralogy

   Mineralogy

  A scientific discipline that is concerned with all aspects of minerals, including their physical properties, chemical composition, internal crystal structure, and occurrence and distribution in nature and their origins in terms of the physicochemical conditions of formation.  ref; The Editors of Encyclopaedia Britannica , Key People: James D. Dana

Quartz

 Pseudo-cubic habit with elongated rhombohedral face.

Quartz Crystal - grizzly ridge quartz ranch site:thisoldrock.com

Grizzly Ridge Quartz Ranch, El Dorado County, Ca.