Geo-Mysteries @ The Children's Museum of Indianapolis

$Golden cube fractures$ Cleavage and Fracture
Good answer! While our golden cube looks like it might fracture into perfect cubes, it actually does not cleave at all. Instead, it fractures into shell-like pieces—just like quartz!

Gold doesn't cleave either. It's such a soft mineral that you can't fracture it either. It bends rather than breaks.

Time to test another mineral property!