Copper etched disc Intermediate 02/13/2014 Cobalt Beginner 02/13/2014 Cerium fragment Intermediate 02/13/2014 Cassiterite Beginner 02/13/2014 Bismuth crystal Intermediate 02/13/2014 Bismuth Beginner 02/13/2014 Veszelyite, hemimorphite Advanced 01/14/2014 Great Blue Hole Advanced 08/30/2013