In this book, the authors present new developments in quartz research. Topics discussed in this compilation include the nature of paramagnetic defects in a-Quartz; veined quartz of the Urals; QCM in the active mode; densification of quartz particle beds by tapping; rapid detection for pollutants and bacteria based on quartz crystal microbalance biosensors; novel quartz oscillator measurement for gas composition changes; detection/adsorption of chemical and biological molecules based on quartz crystal microbalance QCM as sensor; usefulness of quartz crystal microbalance techniques to assess in situ detergency process efficiency; ultra-stable quartz oscillators; and gold analysis after nanoparticle adsorption on quartz reflectors and total reflection x-ray fluorescence (TXRF) analysis.