Question

if a scientist creates a new rock - like substance in a laboratory, why wouldnt this type of material be classified as a true mineral?
it would not be hard enough.
its too new to be a mineral
its an inorganic substance.
its not a naturally occurring substance

Explanation:

Minerals are defined as naturally - occurring, inorganic, solid substances with a definite chemical composition and a regular internal structure. Since the substance is created in a laboratory, it is not naturally occurring.

Answer:

It's not a naturally occurring substance.