Patterns of various crystals and stones laid out for mutual enhancement of their energies and the energies of the surrounded space are called grids. Most frequently, they are laid out in symmetrical geometric patterns, the most popular one being hexagonal, because it mirrors the structure of Quartz and many other minerals. A small grid only a few inches in diameter, perhaps surrounding a picture of oneself or of someone one wishes to help, can be constructed on an alter or table top. I use a wooden grid when I do my gird work. A grid for sitting or reclining meditation can be arranged on the floor of a room in one's home. Bigger grids can be built which encompass one's house, yard, or even large areas of land. I know people who have gridded their whole farm or property for energetic protection and for enhancement of the life of their crops. However, the most frequently used grids are these made for one person to sit or lie within for meditation and/or healing. Combining one of these grids with a stone body layout can provide a profoundly powerful energy environement.