| Term | Definition |
| mineral | a naturally formed, inorganic solid with a crystalline structure |
| element | a pure substance that cannot be separated or broken down by simpler substances by ordinary chemical means |
| atom | the smallest part of an element that has all of the properties of that element |
| compound | a pure substance made or two or more elements that have been chemically joined, or bonded together |
| crystal | the solid, geometric form of a mineral produced by a repeating pattern of atoms |
| silicate mineral | a mineral that contains a combination of the elements silicon and oxygen |
| nonsilicate mineral | a mineral that does not contain compounds of silicon and oxygen |