A mandala is a spiritual and ritual symbol that represents the universe. In common use, “mandala” has become a generic term for any diagram, chart, or geometric pattern representing the cosmos metaphysically or symbolically, a microcosm of the universe. This mandala crystal grid is made out of Birchwood. These are made to order; you can choose between approximately 6, 8, 10, 12, and 14 inches in diameter and 1/4″ thick. This is just for the grid. Stones purchased separately.