Wax is an interesting material to play with. When it is melted, it has the consistency and fluidity of water, and is easily pourable. I experimented with pouring the wax over different materials, but my favorite is ice. The wax fills the negative space between the ice-cubes and hardens, creating a structure much like crystals after the ice melts. Placing it in a form allows for larger pours and accentuates the material.
Wax in a cup
Wax with charcoal
A Closeup of the structure
A practice panel
I'm not sure if crystalline is the best descriptor for this, any suggestions?