"It's important to replace cracked stone with similar natural material.
Avoid streets with car traffic or areas with lots of cracks, stones or other obstacles on the ground.
Sudden dramatic changes in temperature can crack the stone, especially if there is excess water or oil trapped in the porous surface.
If you have the patience, crack the stones with a nutcracker, or wrap them in a tea towel and whack them with a hammer, and remove the kernels.
As they posed for pictures, Karami took Lopez's hand and raised it high, cracking his stone face with a strained smile.
Others crack wise: stones, both collected and copied in bronze, by Vija Celmins, shears made by the cutlery company J. A. Henckels, and a crumpled ball of paper by Martin Creed play a round of rock, scissors, paper.
What they settled on was a variety of methods, said Michael J. Goldstein, vice president for New York construction at Schiavone: sledgehammers, picks, shovels, rams, robotic rock splitters and a chemical compound that is poured into holes in which it expands, cracking the stone as it does.
Finally, on 14 August, the miners attacked the keep itself, lighting a fire under the walls, cracking the stone and filling the building with smoke.
This will help to avoid cracking the stone.
Do not open the oven until is below 300F to avoid cracking the stone.
