Select the one substance that is not a mineral.

 - A computer processor is made in a factory. It is a solid.
 - Native copper is a solid. It is a pure substance.
 - Magnetite is a solid. It is a pure substance.
Compare the properties of each substance to the properties of minerals. Select the substance whose properties do not match those of minerals.
Native copper is a mineral.
A computer processor is made in a factory. But all minerals are formed in nature.
So, a computer processor is not a mineral.
Magnetite is a mineral.