We personally mined these amazing stones this year in Tennessee. Lake Douglas Diamonds are quartz crystals, primarily composed of silicon dioxide (SiO2). These crystals are known for their clarity and brilliance, which make them resemble diamonds. They are typically found in sedimentary environments, often associated with the geological formations around Douglas Lake in Tennessee. The region's geology includes conglomerates, chert, dolomite, and limestone, which contribute to the formation and preservation of these quartz crystals