Rock
Solid combination of one or more minerals
Mineral
Naturally occurring compound that exists as a crystalline solid
Igneous
Formed by cooling and crystallization of magma, two types: intrusive, extrusive
Sedimentary
Formed by piling of materials over time, made of sediments (dead plant/ animal remains)
Metamorphic
Existing rock subject to high temps, pressures, fluids or a combination
Igneous examples
Granite, basalt, quartz
Sedimentary examples
Sandstone, shale, limestone, chalk
Metamorphic examples
Slate, marble, quartzite