What are the elements of Cubist artwork?

Perspective is the main element. Probably the one you need the most (if you are doing it for some kind of work). The Cubists create their artwork by looking at one item and then looking at it in another perspective. They then collect all of the perspectives and make it into one piece of artwork. Look at 'bottle and fishes' by Georges Braque. you will see that the reason why the painting is almost unrecognisable is because they have painted the same objects but at different perspectives.