MIneral: Quartz - Named from the German "quarz", of uncertain origin. The Ancient Greeks referred to quartz as "krustallos" meaning "icy cold", because some philosophers apparently believed the mineral to be a form of supercooled ice. Quartz is the second-most-abundant mineral in Earth's continental crust, after feldspar. 7 Maio 2016 @polyvore-editorial @polyvore