There's this little gray boulder on the second shelf down in the fridge.
His mother had showed him gashes in the woods, filled with gray boulders just like these.
He lay only a few feet from the far edge of the wood, next to a big gray boulder.
A huge gray boulder blocked all but a wedge of our view.
In the middle of the clearing a craggy, gray boulder rose up from the flat ground.
When he thought of the old man he could see him suddenly in a field in the spring, trying to move a gray boulder.
"Sergeant, take two boys and see if there's anybody home up there-right there, above that big gray boulder."
On her way back, she saw a small, gray, chalky boulder near the creek.
About halfway to the hollow we found a path leading up the hill, making its way among big gray boulders.
From the road the most suspicious might have looked carefully and seen only another gray boulder upon the canyon's rim.