Minerals
/min•er•als/
Minerals are the building blocks of rocks. The occur naturally, which means that no one builds them. Minerals look the way they do because of their chemical composition. Chemical composition means the way that molecules, or a very small building block of matter, are placed.
Each mineral is unique and has its own streak, hardness, cleavage, and luster.
Each mineral is unique and has its own streak, hardness, cleavage, and luster.