In non-verbal communication, a symbol representing an object is known as a:

In non-verbal communication a symbol that represents an object is called a concrete symbol, standing for a real, tangible thing that can be seen or touched.

An identity symbol suggests a marker of who someone is, not the general term for a sign that stands for an object.

An explanatory symbol implies a symbol that clarifies, which is not the established label for one denoting a physical thing.

An animated symbol suggests movement or life, again not the term for a sign representing a solid object.

A drawing of a house standing for an actual house shows a concrete symbol at work.

By contrast a symbol for an intangible idea is termed abstract.