The word "quartz" is derived from the German word "Quarz. Also, Pure quartz, traditionally called rock crystal or clear quartz, is colorless and transparent or translucent and has often been used for hardstone carvings, such as the Lothair Crystal. The word 'wartz' comes from an old ballroom dance in Germany. The original form of Waltz was first used by 13th century peasants in Germany, who devised rolling folk dance that was quite different from all court dances that were popular in that time.