The square spiral represents structure, balance, and logic. Unlike the circular spiral, it is comprised of straight lines, and reflects order. It symbolizes a safe space, order, and security. In ancient Greece, the square spiral (Speira) key pattern was called Meandros, or Meander, and transcends time and space. It is the only symbol found both inside and outside the sacred vessels of Golden Mycenae.
The revolution of the spiral represents a route to a higher consciousness, and spiral energy fields even at the atomic level govern our physical lives.
Spirals reflect all things in nature which start from the center and expand. Evolution and awareness. Creation, birth, life, and rebirth.
Sprial growth occurs in our day to day lives in whirlpools, movement of the stars and planets, the shape of a snail's shell, or the curled fern emerging from the earth. Dowsers can detect earth energies which run in spirals.
It is the "center of the world" symbol in the Tibetan mythical kingdowm of Shambhala. It is said the Welsh Goddess, Arianrhod, lived in a castle in the center of a spiral path. In ancient Ireland it is believed a clockwise spiral represented the shrinking winter sun.
It is also symbolic of serpents and dragons. But dragonlore is a subject for another necklace at another time!