For the main part of the beard I positioned and scaled a cube on the chin of my downloaded male face. I then extruded and positioned faces until I had a shape that I liked.   I took greatest care to not create n-gons or triangular faces while modelling the beard and positioned edges in a way that it looks like a triangular face, but in fact is not.

 While I was modelling I came across these surface mistakes. Since I did not want to create any problems later on during the texturing process, I investigated straight away. I found out that this happens when the vertices of a mesh are arranged in a manner that makes face concave. So essentially this happens when a face is not flat. I then proceeded to correct this mistake wherever I found it.

After I was happy with the beard’s look I used a mirror modifier to mirror the mesh and create a full beard.

Jacob suggested a plate that would be fixed to the side of the skull and where the main part of the beard could rotate around,imitating the movement of the jaw. So I quickly built a metal plate that would be fixed to the skull with a cube that I scaled and extruded and used a cylinder to create a big screw. I kept the screw’s mesh very simple, because I wanted to use texture to give it its finishing look.