Definition
Allomerism describes the state of minerals (or other substances) that have the same chemical composition but crystallize in different forms. Think of it like diamonds ๐ and graphite, both made of carbon, but one's a precious gem, and the other is pencil lead โ๏ธ. It highlights how the arrangement of atoms can dramatically alter properties. It's about the internal order affecting external characteristics. It shows that looks can be deceiving ๐ญ.