Quartz Crystals throughout time have been considered valuable.
The strategic value of quartz crystal was demonstrated more than 50 years ago when it gained wide use as an essential component of military communication systems during World War II. After the war, natural electronic-grade quartz crystal was officially designated as a strategic and critical material for stockpiling by the Federal Government. (Credit: U.S. Geological Survey)
Today Quartz Crystals are man made. Below you can see an example of a synthetic quartz crystal that was grown for commercial applications.