Hexagonal Bipyramid Crystal Structure Diagram | Mineralogy Reference #56581 (License: Personal Use)

This precise black-and-white illustration depicts a hexagonal bipyramid-a crystal form with twelve triangular faces arranged symmetrically around a central hexagonal prism. Cross-hatching and shading indicate depth and facet orientation, highlighting the vertical c-axis and basal plane symmetry. The style mimics 19th-century mineralogical engravings, emphasizing structural clarity over realism.

Used in geology textbooks, museum exhibits, and online educational resources to explain crystal systems; targets students, educators, and researchers seeking visual aids for understanding hexagonal crystallography.