
Scabbling—also called scappling—is the process of reducing stone or concrete. In masonry, it refers to shaping a stone to a rough square by use of an axe or hammer. In Kent, rag-stone masons call this `knobbling`. It was similarly used to shape grindstones. In modern construction, scabbling is a mechanical process of removing a thin layer of.....
Found on
http://en.wikipedia.org/wiki/Scabbling

The process of removing surface irregularities for blocks for storage and shipment.
Found on
http://www.selectstone.com/architectural-resources/stone-glossary/
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