They are recognized by a specific set of mineralogical, geochemical, textural, and isotopic characteristics. Igneous rocks can be classified according to chemical or mineralogical parameters. A chondrite's group is determined by its "primary" chemical, mineralogical, and isotopic characteristics (above). This classification is based essentially on the mineralogical constitution of the igneous rocks. The scientists prefer a landing site with both morphologic and mineralogical evidence for past water. They preferred a landing site with both morphologic and mineralogical evidence for past water. During the process of lithification, sediments undergo physical, chemical and mineralogical changes before becoming rock. Specimens were selected for exhibition value as well as mineralogical significance. This process of mineralogical alteration is related to the rock cycle. Typical applications include biological, mineralogical, defence, and industrial measurements. The mineralogical and chemical compositions of laterites are dependent on their parent rocks. DTA may be used in cement chemistry, mineralogical research and in environmental studies. Thorianite is the name of the mineralogical form of thorium dioxide. This due to its mineralogical composition present on the slopes and summits. It is the replacement of one rock by another of different mineralogical and chemical composition.