Quartz is one of the most abundant minerals in the world. Sand is mostly composed of Quartz. Even dust in the air is high in quartz!
Yes, CRYSTALS REALLY DO VIBRATE!! At the beginning of technology, natural quartz crystals were used, but they are now manufactured to achieve specific frequencies. Synthetic crystals are higher in purity, lower in cost, and more convenient to handle. Crystals have been used for a long time to stabilize frequencies in radio transmitters, receivers and watches!
Metaphysically, clear Quartz Crystal is the symbol of elemental wholeness. It assists to amplify, focus, direct, transmit and store energy. It assists the wearer to think intuitively, and works on all levels - strengthening, cleansing and protecting.