Quartz is found worldwide and forms at any temperature in igneous, metamorphic, and sedimentary rocks. When at the beach, desert or river you are likely standing on Quartz sand!
 
Quartz crystals vibrate at such precise frequencies that it is used to make crystal oscillators for accurate watches and clocks. Quartz crystals are also used to make cell phones, computers, electronic games, GPS equipment, radios, televisions, and much more.  
 
Optical-grade Quartz crystal is used to make electronic sensors, lasers, lenses, microscopes, telescopes, windows.
 
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* Photos show all sides.
* Sizes, shapes and colors my vary due to being a natural stone, being hand-carved and/or difference in computer monitors.