Rocks in My Head

I Am Not an Idiot, 2010 by Belgian conceptual artist Kris Martin. The found stones were on exhibit at Sies + Höke gallery in Düsseldorf, 2011. 
::PietMondriaan via this isn't happiness

Rocks are records of events that took place at the 
time they formed. They are books. They have a different vocabulary, a different alphabet, but you learn how to read them. —John McPhee

Or they ARE the alphabet, as in the U&lc pebble alphabets found by Belgian designer and typographer Clotilde Olyff, who collected them over the course of 14 years from the banks of rivers and oceans. These are images from her 
book, Lettered by Jan Middendorp and published by Druk Editions, 2000. 
::Via Grain Edit