A close up of the top of a sea shell shows the intricate layering of the way the off white shell was formed. The layers of the shell almost appear star like and each layer rotates slightly more that the previous layer, each layer becoming smaller tha
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