These are the Crystal Mountains between the oasis Bahariya and Farafra, northern of the White Desert, Egypt, Africa. The Crystals are said to be either Barite and/or Calcite crystals . Nature is Awesome!
This is a very, very large concretion in Bosnia. Concretions are formed when minerals are precipitated in the pore spaces between grains of sedimentary rock. ARE YOU SAYING THIS IS A FRIGGEN GIANT GEOD !