Merkabah, also spelled Merkaba, is the divine light vehicle allegedly used by ascended masters to connect with and reach those in tune with the higher realms.
"Mer" means Light. "Ka" means Spirit. "Ba" means Body. Mer-Ka-Ba means the spirit/body surrounded by counter-rotating fields of light, (wheels within wheels), spirals of energy as in DNA, which transports spirit/body from one dimension to another.
Often associated with Archangel Metatron due to the Sacred Geometry and his affiliations to it.
Compound the energy from any given stone with all of those aspects and BOOM. So much energy.