incrustation

Noun

• The act of incrusting, or the state of being incrusted.
• 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.
• A covering or inlaying of marble, mosaic, etc., attached to the masonry by cramp irons or cement.
• Anything inlaid or embedded.