In nature quartz crystals are twinned, distorted and intergrown with adjacent crystals of quartz or other host minerals.
A quartz geode is where the void is somewhat sphere shaped, lined with a solid bed of crystals that point inward. The name "quartz" comes from the German word "quarz", which is of Slavic origin. Quartz crystals have the ability to rotate the plane of polarization as light passes through them. They can also become polarized with a negative charge on one end and a positive charge on the other when subjected to pressure, they also will vibrate if an alternating electric current is applied to them as well.