Chakra: Root and Sacral
Copper is a conductor of energy, and amplifies thoughts when sending and receiving psychic communication. Balances the body's polarities. Combats fatigue, lethargy, restlessness, and non-acceptance of one's self.
The word Merkaba can be broken down to: MER: rotating fields of light, KA: spirit, and BA: soul (this is taken from an 18th dynasty Egyptian translation, and in Hebrew it means 'chariot'). Therefore, Mer-Ka-Ba means the spirit or energy body surrounded by counter-rotating fields of light, or spirals of energy (as with a strand of DNA), which transport spirit or consciousness from one dimension to another.
When the Merkaba shape is activated around your body, you are in a place of complete protection. It is believed that with practice using the energy and shape visualization of a Merkaba, you can activate an energy field around you which is capable of carrying your consciousness directly to higher realms.