Calcite with quartz from Huanggang Mine, Inner Mongolia, China. The pictured specimen is 7cm tall. The quartz at the center of the stacked calcite disks is better exposed in some of the specimens that they have at the show. Photo credit: Jeffrey A. S
Thierry Cohen made these by combining the daylight pics of the cities and the pristine skyline of the desert at the same latitude, direction, and angle. He wants to show what city dwellers would see without all the light pollution