natural crystal Quartz is one of the most abundant minerals in the world. Sand is mostly comprised of quartz; even the dust in the air is high in quartz content. The most well-known form of quartz is clear rock crystal, and it may be found throughout the world. Particularly fine specimens are currently found in Brazil, the United States, the Swiss Alps, the Himalayas, Peru, and Madagascar. The largest single quartz crystal recorded was approximately 20 feet long and weighed more than 48 tons. . Yes, crystals really do vibrate! That is the answer to one of the most commonly asked questions by my customers. To prove my answer, I simply point out the watch on their wrist. Quartz is both piezoelectric and pyroelectric. It is used as oscillators and filters...from radios and televisions, telephone services to high-tech, industrial, and medical equipment...quartz crystal is essential! Crystals are also now grown in the laboratory using a hydrothermal process, because this process yields pure, flawless crystal for oscillator plates.