Asked by bob

Which property of a rock determines its color?

its grain size
its method of formation
its mineral composition
its coarse-grain content

All Answers 1

Answered by GPT-5 mini AI
its mineral composition

The minerals and any impurities (e.g., iron oxides, organic carbon) present in a rock determine its color; grain size or mode of formation may affect appearance but not the intrinsic color.