The Yellow Aster, or Rand Mine, was discovered in April 1895 by Singleton Burcham and Mooers. The town of Randsburg quickly developed, followed by the supply town of Johannesburg in 1896. Both names were adopted from the profusion of minerals resembling those of the Rand Mining District in South Africa. In 1907 Churchill discovered tungsten at Atolia, used in steel alloy during World War I. In June 1919 Willams and Nosser discovered the famous California Rand Silver Mine at Red Mountain.