Chalcedonies include many types of cryptocrystalline quartz gems ... are made of clusters or mixtures of minerals, and minerals and rocks affect landform development and form natural resources ...

A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type of ... of sedimentary rock formation, some of the minerals in the ...

Ever wonder how Earth scientists examine rocks? We cut them up and throw them under a microscope ... and then everything ...

Some minerals in rocks and organic matter (e.g., wood, bones, and shells) can contain radioactive isotopes. The abundances of parent and daughter isotopes in a sample can be measured and used to ...

Primary minerals form at elevated temperatures from cooling magma during the original solidification of rock or during metamorphism, and they are usually derived from igneous and metamorphic rocks ...

The film also covers the formation of different types of rocks—igneous, sedimentary, and metamorphic—and highlights the economic value of minerals, mining practices, and the importance of ...