Ruby and purple stones helped cure emotional and spiritual problems; and black crystals, no longer in existence, were powerful protectors.

For general rejuvenation and a return of vitality the ancient Atlanteans periodically meditated 15 to 20 minutes inside a circle of 6, 11, 22 or 24 stones of different types, holding a clear quartz in their hands, which acted as a control and focaliser.

All these various crystals received their power from a variety of sources, including the Sun, the Earth's energy grid system, or from each other. The larger stones, called Fire Crystals, were the central receiving and broadcasting stations, while others acted as receivers for individual cities, buildings, vehicles and homes. On a higher spiritual level, rooms made of crystals were places where the Initiates left their bodies in the Final Transcendence, often never to return.

In the modern Bermuda Triangle, on the ocean bottom where the ruins of Atlantis now exist, the energy build-up in the sunken and damaged Fire Crystals can periodically trigger dematerialisations of anything in the area.

One of the most detailed descriptions of the Atlantean use of a mysterious instrument called the Great Crystal was given by Edgar Cayce, who mentioned it many times. The crystal, he said was housed in a special building oval in shape, with a dome that could be rolled back, exposing the Crystal to the light of the sun, moon and stars at the most favourable time.

The interior of the building was lined with non-conducting metal or stone, similar to asbestos or bakelite, a thermosetting plastic. The Crystal itself, which Cayce also called the Tuaoi Stone, or Firestone, was huge in size, cylindrical in length, and prismatic in shape, cut with six sides. Atop the crystal was a moveable capstone, used to both concentrate incoming rays of energy, and to direct currents to various parts of the Atlantean countryside.

It appears that the Crystal gathered solar, lunar, stellar, atmospheric and Earth energies as well as unknown elemental forces and concentrated these at a specific point, located between the top of the Crystal and the bottom of the capstone.

The energy was used for various purposes. In the beginning it was used as purely a spiritual tool by initiates who could handle the great energy. The early Atlanteans were peaceful people. As they developed more physical material bodies, they used the crystal to rejuvenate their bodies and were able to live hundreds of years while maintaining a youthful appearance.

Later the Crystal was put to other uses. Currents of energy were transmitted throughout the land, like radio waves, and powered by these, crafts and vehicles traversed the land, through the sky and under the sea at the speed of sound. By utilisation of other currents originating from the Crystal, the Atlanteans were also able to transmit over great distances the human voice, and pictures, like modern television.