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Boji Pop Stones also known as Pop Rocks like are used to balance the flow of male and female energy in the body. The spiky stone is male and is placed one hand, the smooth stone is female and is placed in the other hand. The stones are used together. They can be used in meditation or held whilst receiving healing of almost any kind.
Many crystal healers, reiki healers, and spiritual healers like to use these stones as they are especially good when used with people who feel they are blocked, of suffer from lethargy. The stones stimulate the flow of energy around the user.
Some feel that the stones balance the electro magnetic currents in the body, aiding the meridian channels as well as the chakra energy points.