Sillimanite is an aluminum silicate mineral that forms under high-temperature metamorphic conditions. It is one of the...

Andalusite is an aluminum silicate mineral commonly found in metamorphic rocks formed under relatively low-pressure...

Kyanite is a distinctive blue aluminum silicate mineral commonly found in metamorphic rocks. It is especially...

Minerals are not only identified by physical appearance — they also have important chemical properties that help...

Mineral identification is one of the most important skills in geology and Earth science. Geologists identify minerals...

Minerals can look very different from one another, and scientists use their physical and chemical properties to...