Which of the following is not a characteristic of heavy minerals?

The correct answer is based on the defining qualities of heavy minerals. Heavy minerals are characterized by their high density, which typically exceeds 2.8 grams per cubic centimeter. This high density is crucial for distinguishing them from lighter minerals.

When discussing heavy minerals, it is important to understand their behavior in natural processes. They can indeed be concentrated by water action, as lighter minerals are more easily transported by flowing water, allowing heavy minerals to settle in specific locations. Moreover, due to their unique properties, heavy minerals are often targeted in mining for various industrial applications, such as titanium, zirconium, and other valuable minerals.

The choice indicating that heavy minerals are lighter than average minerals contradicts the fundamental definition of what constitutes a heavy mineral. This mischaracterization highlights why it stands out as the correct answer in the context of the question.