incrustation

During the restoration of the 17th-century work, specialists removed incrustations on the glass that filters the light, rendering the scene even more dramatic.

It appears to have spent a good deal of time in the ocean, as it is partially covered with marine incrustations.

From close up the “lake” is a glistening incrustation of blue-green glass 2,400 ft. in diameter, formed when the molten soil solidified in air.

Many contained incrustations, indicating they were “fresh out of the earth,” said Robert Englund of the Cuneiform Digital Library Initiative.

Many contained incrustations, indicating they were "fresh out of the earth," said Robert Englund of the Cuneiform Digital Library Initiative.