Wow !! A remarkable druse made up of large scalenohedral crystals of calcite with an almost milky color and shiny. The peculiarity that distinguishes them is that some of them on the edges and on some faces are sprinkled with micro crystals of pyrite, arranged almost in orderly rows. These samples were available on the market in 2008, the year in which I purchased this one, and then never seen again at the various mineralshows. Very aesthetic! IF YOU LIKE PLEASE LOOK AT THE VIDEO http://www.gmineral.com/Catawiki/CW25111_Calcite.mp4