There are over 5,000 known types of minerals. Just a few minerals make up most of the rocks we see, though: feldspars, amphiboles, quartz, olivine, garnet, micas, calcite, and pyroxenes.

There are lots of types of rock and each type has different properties and uses. For example, some are strong and hard but others are soft and sandy. Some rocks are harder than others. For example ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

A new high-resolution computer model shows rocks that are colder, or have a different composition, in Earth's mantle where ...

Old Rock Day on January 7 honors the significance of rocks, fossils, and Earth's geological history. Discover ways to ...