When making a pyramid certain metals or even stones have to be used in order to create the Earths' energetic field from a mineral level. All the other kingdoms are raise up from the foundation of the mineral kingdom. The vegetable kingdom responds to the mineral as do the animal and human kingdoms. The mineral kingdom responds to the light in the form of electricity and radiation, so when you are building something that is applying light and electro-magnetic fields and is an energetic principle, you have to work with those laws. The pyramid also has to apply perfect geometric proportion. Shambhala pyramids are built in absolute perfection: all of the corners are made correctly, each one has 24K gold plated capstone and octahedron corner connectors made out of copper, allowing them to be proportionally correct unlike other pyramid systems.
Metal pyramids often have connections at each bottom corner that are very strange, they can have bolts or just connected together with wire or strings to make the 3 poles come closely together. In many pyramids, the corners do not come to a point. Instead they are squared off or are just not perfectly proportioned. Cardboard or wooden pyramids are made from inert matter and so do not resonate with electrical or magnetic fields, so they will not have a very strong connection with the Earth's magnetic field. Pyramids made out of glass and plastic are the same.