spalling

noun3

1. •
   The process of reducing (stone blocks, etc.) to an approximately level surface by hammering.

   • In the British-made Greek bricks the magma is not so evenly distributed, but after successive spallings the brick is converted bit by bit into the larger crystal formation […] — 1919
2. •
   Any process that spalls a surface, or the damage that results from that process: spallation.

   • He says: "If we'd left any cracks exposed then it could have resulted in spalling. — 2021
3. •
   A fragment or chip of stone.

   • A third process fluid, water, is employed to cool the burner and to aid in the removal of spallings. — 1967