The Mystical Code The Squared Circle is an Alchemical Symbol from the 17th century, illustrating the interplay of the four elements of matter symbolising the philosopher's stone. The philosopher's stone is a legendary alchemical substance capable of turning base metals such as mercury into gold. Alchemists were mysterious adepts exchanging messages in a coded form.They were even seen as having paranormal powers which enabled them to do all sorts of magical methods. Magic means that you can’t see behind the curtain. Technology also hides some mysticism and magic. The use of technology seems like the act of alchemy. It is like a black box. You see what goes in and out but never what happens inside.