The crystal is observed to have a well-defined external shape with distinct faces, edges, and corners. The faces appear smooth and flat, reflecting light in a regular pattern. The edges form sharp angles where two faces meet, and the corners are points where three or more faces intersect. The overall shape of the crystal may be geometrically regular, such as a cube or hexagonal prism, or more irregular with a combination of different faces and angles. The symmetry of the crystal's external shape is often indicative of its internal atomic arrangement and can provide clues about its mineral composition and crystal structure.
