Most descriptions of magickal altars describe what goes on them. They advise that you use a box, a small table, or just about anything, then cover it with a cloth and put all of your ritual items on it.
The ceremonial magick altar is different. Often, it will have no cloth cover at all. The design and shape of the altar, however, is fairly specific. Let's look at why:
It is a double cube. The reason for this is simple. When you form a magickal circle, you literally become a small version of the universe within the circle. The two cubes represent all things: the smaller (microcosm) and the greater (macrocosm). They also remind us of the principle, "as above, so below." What we