During the Australian gold rushes, starting in 1851, significant numbers of workers moved from elsewhere in Australia and overseas to where gold had been discovered. Gold had been found several times before, but the colonial government of New South Wales (Victoria did not become a separate colony until 1 July 1851) had suppressed the news out of the fear that it would reduce the workforce and so destabilise the economy.After the California Gold Rush began in 1848, many people went there from Australia, so the New South Wales government sought approval from the British Colonial Office for the exploitation of mineral resources, and offered rewards for finding gold.