GEOLOGY & PLANETARY SCIENCE A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site quartzite Quartzite. Credit: Mineral Information Institute A hard, massive metamorphic rock resulting from sandstone in which the quartz grains have recrystallized. It is typically colored white, light gray, or yellow, but it comes in green, blue, purple, and black varieties that contains other minerals. Related category    • GEOLOGY AND PLANETARY SCIENCE Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP