A natural, polished clear quartz sphere. Sphere made in Canada from Brazilian quartz. Clear Quartz is also known as crystal quartz and is a mineral made of oxygen and silicone atoms; it has the formula SiO2 and belongs to the trigonal crystal system. It has a Mohs hardness of 7, making it a relatively hard mineral. It has a vitreous luster and conchoidal fracture, and it is piezoelectric, meaning it can generate an electric charge under mechanical stress. Quartz spheres have a rich history that spans back to ancient times. People believed that quartz could cleanse and energize environments, and it was often used in decorative and spiritual practices. Mineral: quartz Size: 1.75″ inches Weight: 109 g