Merkaba is a word representing 2 counter rotating fields of light. One masculine tetrahedron (a pyramid with a base of 3 points) and one feminine tetrahedron. Many consider it to be a vehicle for the light body. Black suggests insight or intuitive wisdom and the gray represents the awakening to oneness, often hinted at in alchemical references. White is involving the divine in the process ”spoken of” by this Sacred Geometry Mandala.