This is a Antahkarana Crystal Grid made out of Birch wood. These are made to order, you can choose between approximately 4, 6, 8, 10, 12 and 14 inches in diameter and 4mm thick. This is just for the grid, stones are not included.
In Hindu philosophy, the antahkarana (Sanskrit: "the inner cause") refers to the totality of two levels of mind, namely the buddhi, the intellect or higher mind, and the manas, the middle levels of mind which (according to theosophy) exist as or include the mental body.
The Anthakarana symbol will also neutralize negative energy that has collected in objects such as jewelry or crystals simply by placing the object between two symbols. In addition, it will enhance all healing work including Reiki, Mahikari, Jin Shin, Polarity Therapy, Chiropractic, Hypnotherapy, and Past Life Regression. These positive effects have been confirmed over and over by the improved results noted by those using the symbol and by clairvoyent observation by those trained in sensing changes in the aura and chakras.
This symbol is multi-dimensional. From one perspective it appears to be two dimensional, being made-up of three sevens on a flat surface. The three sevens represent the seven chakras, the seven colors and the seven tones of the musical scale. These three sevens are mentioned in the book of Revelations as the seven candle sticks, the seven trumpets and the seven seals.
From another perspective this symbol appears as a three dimensional cube. Its energy moves up from two to three dimensions that can be seen and continues up through unseen dimensions all the way to the highest dimension - the dimension of the Higher-Self.