Chakra literally means the wheel. Why does this matter?
The energy within us is balanced and distributed by these chakras through the psychic channels or Nadis.
If one of your chakras is moving slowly or is blocked, the energy levels inside of your body become imbalanced and your health suffers.
Every chakra in our body has its own vibration and hence its own colour, sound and frequency which can be influenced by corresponding frequencies emitted by natural stones and other influencing objects. Therefore, these stones, if used correctly, have a 'healing' effect.