If you try to cut a nail with a brick, it will not collapse. If it is scratch then it should not be good to brick.
If you hit a brick with another brick, if the noise creates noise, then it will be good to know that the brick is good.
If it breaks two bricks like T (T) and throws it up to 2 meters high then it breaks if it does not break, and if it does not break, brick is good.
If the bricks are soaked in a pot and it absorbs a lot of water with bubbles and the water is muddy, it is not a good brick.
If the pieces are broken in a brick, it is similar to the color of the piece, but it is a good brick.
If the brick lining and angle are sharp and sharp, it should be a good brick.