What is rock made up of?
A quick amswer: Rocks are made up of minerals; which are naturally occurring crystalline compounds. The minerals may be bound together because they have solidified from molten magma or lava (igneous rocks), have been cemented together from particles (mineral grains or other rock fragments) that have undergone compression (sedimentary), or have been produced as the result of high temperature and pressure acting on already formed rocks, altering their physical and mineralogical structure (metamorphic). Most rock forming minerals are various forms of silicate minerals.
