The property that gives basalt its dark color is its mineral content. Basalt is primarily composed of mafic minerals, such as pyroxene and olivine, which are rich in iron and magnesium, contributing to its darker color compared to other types of igneous rocks.
Fran finds a dark-colored rock that she identifies as basalt. Which property gives the rock its dark color?
its shape
its banding
its grain size
its mineral content
1 answer