Mash-up of rock model by Zac Leung (https://grabcad.com/library/rock-4) with an inscription and flatten base for easier 3D printing without supports. Ideal for testing such marvelous filaments like the new Vertigo Galaxy (or previous Vertigo Grey) from Fillamentum.
And why on earth print the most ordinary thing in the world? Because this rock is special. ;)
If you can, use max. 0.1mm layers or variable layers with smaller thickness for almost horizontal surfaces on top of the rock.