Gold doesn't have a single, definitive crystal shape. It's a cubic crystal system, meaning its atoms are arranged in a cube-like structure. However, within this system, gold can form various crystal habits:

* Cubic: The most common, resembling perfect cubes.

* Octahedral: Pyramidal with eight triangular faces.

* Dodecahedral: With 12 faces, each shaped like a pentagon.

* Various combinations: It can also exhibit mixed habits with combinations of these basic shapes.

Why is gold rarely found in perfect crystal shapes?

* Imperfections: Natural gold is often found with impurities and defects that disrupt perfect crystal formation.

* Deformation: Geological forces can deform and distort crystals.

* Erosion and Weathering: Over time, exposure to the environment can erode crystal edges.

So, while gold is a cubic crystal system, its actual shape in nature is often irregular and determined by the specific geological processes it has undergone.