Yantras are geometrical figures intended to represent the basic energies. Just as every elementary geometrical figure, a straight line, a square, a cross or a triangle etc., has a symbolic value corresponding to the basic notions, similarly, they symbolise one or the other power or energy. In other words they are the graphic representations of Mantras. They can be drawn, engraved or painted on a variety of substances. The classical eight tantrik surfaces are gold, silver, copper, crystal, birch, bone, hide (which can include any type of paper), and Vishnu stone (shalagrama).
They are designed to remove the afflictions to obtain a specific result. They are inscribed with the mystical inscriptions of the afflicted beneficial planets at a particularly auspicious time to suit the individual wearer. It shall be seen daily in the morning and one shall lit incense or lamp before it every morning. It is auspicious and blesses the native with success and wealth by its continous puja.