Mineral found in granite radiometric dating
Granite is widely distributed throughout the Earth.
Because of its hardness and comparative cheapness in relation to marble, granite is often used to make kitchen countertops.
It also may contain mica minerals or other dark-colored silicate minerals.
Click on the picture to the left to take a closer look at granite!
A simple definition is used in introductory courses; a more precise definition is used by petrologists (geologists who specialize in the study of rocks); and, the definition of granite expands wildly when used by people who sell decorative stone such as countertops, tile, and building veneer. The pink grains are orthoclase feldspar, and the clear to smoky grains are quartz or muscovite. It forms from the slow crystallization of magma below Earth's surface. The grain size is coarse enough to allow recognition of the major minerals. Granite is a light-colored igneous rock with grains large enough to be visible with the unaided eye.A granite containing both muscovite and biotite micas is called a binary granite.The word granite comes from the Latin granum, a grain, in reference to the grained structure of such a crystalline rock.