Calcite with quartz from Huanggang Mine, Inner Mongolia, China. The pictured specimen is 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.
1925 The Isolator is a bizarre helmet invented in 1925 that encourages focus and concentration by rendering the wearer deaf, piping them full of oxygen, and limiting their vision to a tiny horizontal slit. The Isolator was invented by Hugo Gernsback,.