Stones give us the most direct link to the time, billions of years ago, when our planet was still in an active state of formation . They are the most direct link to the stuff of the Cosmos that we have. In them are stored the elemental power of the Universe. This is why when we quieten we relate to them, for though transient, we too are stardust.
On the conscious level symbols powerfully convey a shared visual message to large groups of people and which serves to unite them. At a deeper and more powerful level, symbols provide a direct line to our collective unconscious, by recurring across all cultures, nations and millennia, confirming that what unites us is far older and fundamental than what divides us.