When I inspect and report the surface conditions of brick and concrete, and use the term efflorescence, it has more aesthetic rather than structural consequences.
Quoin has come to be known as the accentuation of a building’s corner with short side header bricks or stone blocks and long side stretcher bricks or stone blocks that may or may not differ from the wall masonry in size, color, or texture.
We know that efflorescence is a fine, white, powdery deposit (see photo at right) of water-soluble salts left on the surface of masonry as the water evaporates. These efflorescent salt deposits tend to appear at the worst times, usually about a month after the building is constructed, and sometimes as long as a year after completion. Three conditions must exist before efflorescence will occur. If one is left out, efflorescence cannot form.