The Glories of Gopi-chandana Tilak 

According to Vaishnava tradition, gopi-chandana, or the sacred soil from Dwaraka or Vrnadavan, is applied on the body in twelve places while reciting mantras to Lord Vishnu. This process purifies one's body, designating it as a temple of the Lord. Besides purification, the tilak also offers the wearer protection from ghosts, evil influences, bad dreams, accidents and many other things. It keeps one's mind calm and allows one to constantly remember Lord Krishna. The sacred dust of vrindavan is said to have touched the lotus feet of Sri Krishna's exclusive devotees and is worship able even by Sri Krishna himself.