is an igneous rock a compound element or mixture
With a liberal definition of rocks, there are some of all kinds: Rock salt is a compound, igneous rocks are usually homogeneous mixtures, gold nuggets are an element, and most â¦ granites are heterogeneous mixtures.t is a pure substance.   2. It can not be separated by physical method.   3. Element loose th â¦ eir properties in a compound.   4. Its composition is fixed through out its mass.   5. It has fixed melting point.    MIXTURE   1.