Lingams are egg-shaped stones made of cryptocrystalline quartz. They are found in one of the seven holy sites of India - the Narmada River in Onkar Mandhata. Villagers gather the stones from the river and hand polish them. The egg shape is considered a phallic symbol of the Hindu god Shiva. The shiva lingam represents both male and female, as well as the cosmic egg from which all creation emerged. This stone resonates with energies of all the elements - Earth, Fire, Water, Air and Stone.