| A | B |
|---|
| mineral | a natural, usually inorganic solid that has a characteristic chemical composition and an orderly internal structure |
| crystal | a solid whose atoms, ions, or molecules are arranged in a regular, repeating pattern |
| atom | the smallest unit of an element that maintains the properties of that element |
| element | a substance that cannot be separated or broken down into simpler substances by chemical means |
| streak | the color of a mineral in powdered form |
| cleavage | in geology, the tendency of a mineral to split along specific planes of weakness to form smooth, flat surfaces |
| matter | anything that has mass and takes up space |
| compound | a substance made up of atoms of two or more different elements joined by chemical bonds |
| luster | the way in which a mineral reflects light |
