Below is a comprehensive list of all of the important healing crystals, gems and gemstones.
Crystals and gemstones have amazing holistic healing abilities and can be used for many other applications such as meditation, quantum touch healing and reiki, as well as for chakra clearing and chakra balancing.
Quartz crystals have piezoelectric properties; they develop an electric potential upon the application of mechanical stress. An early use of this property of quartz crystals was in phonograph pickups. One of the most common piezoelectric uses of quartz today is as a crystal oscillator. The quartz clock is a familiar device using the mineral. The resonant frequency of a quartz crystal oscillator is changed by mechanically loading it, and this principle is used for very accurate measurements of very small mass changes in the quartz crystal microbalance and in thin-film thickness monitors.
Thanks to In5D for this article