A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type of atom ... Igneous rocks are formed from the cooling of molten rock.

They are inorganic, crystalline solids with a known chemistry. Examples of minerals include diamonds, garnets and even water ice! Rocks are made up of one or more types of minerals; for example, ...

metamorphic and sedimentary rocks. Figure 1.1: Approximate mineral compositions of the more common types of igneous rocks, e.g. granite approximately 40% orthoclase, 33% quartz, 13% plagioclase, 9% ...