Heaven and Earth's Crystal incenses are made with 100% pure essential oils, hand blended and chosen to be energetically matched to Clear Quartz's subtle energies. In addition, the oils used in these products are charged by soaking Clear Quartz crystals in them during their preparation.Clear Quartz, also known as rock crystal, occurs all over the world. It has a hardness of 7, and is found in crystal points, clusters, plates, sheets, masses and other forms.