<Table> Australian gold rushes <Tr> <Td_colspan="2"> Gold diggings, Ararat, Victoria, by Edwin Stocqueler, 1854 </Td> </Tr> <Tr> <Th> Date </Th> <Td> May 1851--c. 1914 </Td> </Tr> <Tr> <Th> Duration </Th> <Td> Australia </Td> </Tr> <Tr> <Th> Type </Th> <Td> Gold rush </Td> </Tr> <Tr> <Th> Theme </Th> <Td> Significant numbers of workers (both from other areas within Australia and from overseas) relocated to areas in which gold had been discovered </Td> </Tr> <Tr> <Th> Cause </Th> <Td> prospector Edward Hargraves claimed to have discovered payable gold near Orange </Td> </Tr> <Tr> <Th> Outcome </Th> <Td> Changed the convict colonies into more progressive cities with the influx of free immigrants; Western Australia joined Federation </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Gold diggings, Ararat, Victoria, by Edwin Stocqueler, 1854 </Td> </Tr>

When did the gold rush in australia start and end
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