incrustation

noun

1. (countable, uncountable)The act of incrusting, or the state of being incrusted.
2. (countable, uncountable)A crust or hard coating of anything upon or within a body, as a deposit of lime, sediment, etc., from water on the inner surface of a steam boiler.
3. (countable, uncountable)A covering or inlaying of marble, mosaic, etc., attached to the masonry by cramp irons or cement.
4. (countable, uncountable)Anything inlaid or embedded.
5. (countable, figuratively, uncountable)An accumulated characteristic of a person that disguises their true nature.

   “Her reception of her brother was most affectionate—there are times when the most artificial, by habit, become natural; when the early memories of the heart, for a short time at least, spring up as a fountain of living waters, overflowing the selfish vanities and conventional incrustations which the world has planted—giving honest smiles to the countenance; artless, yet loving words to the tongue; and the gratified heart seems restored to a new childhood.”