Images via: (clockwise from top left) 
“Salt” by David Björn (cropped from original), “agate” by andy muir (cropped from original), “Agates” by Smabs Sputzer (cropped from original), “Uruguay agate” by Jessa and Mark Anderson (cropped from original), “agate” by Lisa Ann Yount, “Australian Moss Agate Opus02” by zygzee, “Edge of Agate” by Mark Chinnick (cropped from original), “Condor agate 1” by Jessa and Mark Anderson, “omsi agate and mineral show” by theNerdPatrol
