Difference between Diaglyph and Intaglio

What is the difference between Diaglyph and Intaglio?

Diaglyph as a noun is glyptic art consisting of a sunken or depressed engraving or carving on a stone or gem. while Intaglio as a noun is a design or piece of art which is engraved or etched into something.

We hope you now know whether to use Diaglyph or Intaglio in your sentence.