During the Australian gold rushes, significant numbers of workers (both from other areas within Australia and from overseas) relocated to areas in which gold had been discovered. A number of gold finds occurred in Australia prior to 1851, but only the gold found from 1851 onwards created gold rushes. This is mainly because, prior to 1851, the colonial government of New South Wales (Victoria did not become a separate colony until 1 July 1851) had suppressed news of gold finds which it believed would reduce the workforce and destabilise the economy.After the California Gold Rush began in 1848, which caused many people to leave Australia for California to look for gold there, the New South Wales government rethought its position, and sought approval from the Colonial Office in England to allow the exploitation of the mineral resources and also offered rewards for the finding of payable gold.