Crystallography Diagram: Polyhedral Mineral Face Notation and Symmetry #226969 (License: Personal Use)

This black-and-white line drawing depicts a complex polyhedral crystal form, commonly used in mineralogy to represent symmetry and face relationships. Each face is labeled with letters (m, r, z, s, x) denoting specific crystallographic planes, while dashed lines indicate hidden edges and angles like α and β denote interfacial angles. The diagram follows standard conventions in crystal morphology for teaching and identification.

Used in academic textbooks, online geology courses, and mineral identification guides to explain crystal symmetry, face notation, and morphological analysis; targets students, educators, and professionals seeking to interpret crystal forms.