Tennessee Historical Commission marker at the north end of McSween Memorial Bridge (US-321) in Newport, Tennessee. The sign recalls the location of War Ford, 0.2 miles to the east along the Pigeon River. The ford was an important crossing along the Great Indian Warpath.
Definition: a substance in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating three-dimensional pattern. Most crystals are solids.
Crystal: any solid material whose atoms are organized in a repeated pattern of one of four types: covalent, ionic, metallic and molecular. Covalent crystal: the atoms share electrons; diamond ; Ionic crystal: the atoms are drawn together by opposite charges; table salt ; Metallic crystals: atoms are metal elements; gold nuggets