A stone fragment that has split or broken off the face of a stone, either by the force of a blow or by weathering. Sizes may vary from chip size to one and two man stones. Spalls are primarily used for taking up large voids in rough rubble or mosaic patterns.
SPLIT FACE (SAWED BED)
Usually sawed on the stone bed and split by hand or machine so that the face of the stone exhibits the natural quarry texture.
Dimensional allowance made for the inability of men and machines to fabricate a product of exact dimensions.