Minerals Solid

a collection of various minerals.

minerals naturally occurring solids formed through various geological processes under high pressures. classified true mineral, substance must have crystal structure uniform physical properties throughout. minerals range in composition pure elements , simple salts complex silicates thousands of known forms. in contrast, rock sample random aggregate of minerals and/or mineraloids, , has no specific chemical composition. vast majority of rocks of earth s crust consist of quartz (crystalline sio2), feldspar, mica, chlorite, kaolin, calcite, epidote, olivine, augite, hornblende, magnetite, hematite, limonite , few other minerals. minerals, quartz, mica or feldspar common, while others have been found in few locations worldwide. largest group of minerals far silicates (most rocks ≥95% silicates), composed largely of silicon , oxygen, addition of ions of aluminium, magnesium, iron, calcium , other metals.