Magic Forums

So opening a circle with a pentacle I believe most people can agree opens the door to the other side thus making the ritual/spell work and have power, But does it have to be a pentacle? Could it, let's say, be one of Solomon's seals? To me his seals are just as powerful with magical intent than the pentacle. Could opening a circle using one of Solomon's seals work? Is there a yes or no or could that just be preference? Any help and advice is appreciated.