Raw or rough crystals are the recommended shape for maximum power
Shapes: Most shapes can be found in rough (or raw) and tumbled.
Points – focus and amplify the power of the stone towards the point. Best used in manifesting intentions and for pendulums.
Sphere – emit energy equally out in all directions and provide gentle and full energy that grounds and surrounds you. Useful in meditations while held in hands.
Cube – powerful grounding shape to create calmness in your environment. Used to make protection grids by placing them in all four corners of a room.
Pyramid – a sacred shape that beams concentrating energies up into the universe. Useful in manifesting intentions by writing them down and then placing the pyramid on top.
Heart – reminds us to keep its healing properties close to our heart. Used to help the energy properties of the crystal that you want to give and receive.
Harmonizers – a pair of cylinders placed in hands for meditation by giving spiritual, mental and physical balance.
Cluster – has numerous points for vibrating higher energies. Useful in maintaining elevated energies in your space.
Tumbled – small, smooth stones that are great for pockets and purses. Used on your person or for grids.
Crystal Grids:
Is a formation of stones, usually emanating from a central stone spreading out. Grids create an energy field with your intentions and hold that energy long after it is set. Can be desk size or massive like for spiritual retreats. One drawback of crystal grids is the need for numerous amounts of the same crystal.
References: www.thelawofattration.com, www.energymuse.com, www.chakrahealingsounds.com