The stones are classified according to their origin: this includes containing materials and the process by which they came to join. It is important to differentiate between a mineral and a rock, as in common parlance the two stones are called for geological purposes but are not equal.
A mineral is chemically homogenous substance, while a rock is a combination of several minerals. For example, quartz is a mineral while granite is a rock composed of three minerals: quartz, feldspar and mica.
Minerals may form crystals and thus have the form of a stone. In the construction it is more common to use minerals in powder form as additives and used for everything from rock foundation to facades.
Different types of rocks may contain the same minerals, but if you do not have the same training conditions resulting in rocks with very different characteristics and therefore different classifications.
The word Igneous comes from Latin and means fire. These stones are formed by the cooling of magma inside the Earth or when magma flows to the surface, also known as magmátitas or magmatic rocks. The most common minerals in igneous rocks are silicates, among the components are light colored quartz and feldspar, and dark include micas, pyroxenes, amphibole and olivine.
Examples of igneous rocks and construction applications
They are composed of other rocks: they are formed by the accumulation of sediments that were consolidated into hard rock through a process of erosion, transport and deposition of pre-existing rocks. Sedimentary rocks are usually found in layers or strata.
Examples of sedimentary rocks and construction applications
Its name comes from the Greek meaning “change of form.” When igneous or sedimentary rocks are subjected to high pressures and temperatures, changes in mineral and in the form and arrangement of the grains are generated, generating metamorphic rocks.
Examples of metamorphic rocks and construction applications