“For example, biotite is a common mineral of metamorphic rocks; however, it does not occur in very low grade rocks, its composition then being represented by mixtures of muscovite and chlorit ...

The Science Education Center houses thousands of rock and mineral samples in what is known as "The Rock & Mineral Room ... Note: Each sample is numbered according to a system of identification, so the ...

Your phone can identify just about any plant in your ... If you know nothing about rocks, gems, and minerals, an app like ...