Marble is a mixture of several types of different rocks. Thus meaning it does not have a crystalline structure. Although, Marble's energies come from the color.
Black is a protective color that actually gives you a sense of power. It makes you feel secure, daring, and physically powerful. Black crystals are very protective and offer you a retreat, the safety of being hidden from your enemies.
Water energy is traditionally associated with the entry or the North area of a home or room. It is associated with the Career and Life Path area. Its flowing energy will assure a balance of energy as your life unfolds and flows.
Marble is used in mediations to enhance insight and assist in communications with Higher sources of information and intelligence. It sensitizes a person to their spiritual capabilities. It enhances inner vision and allows for smooth communications with the Spirit world. It is also used to calm anger and stress before a formal meditation effort.
Crystalrocksandgems.com tells us that marble is a cleansing stone highly beneficial to blood, skin, and several other bodily systems.