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What is the rocker and cradle?

Updated: 9/17/2023
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13y ago

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A rocker and cradle gets its name from its method of operation. Simply, a rocker consists of a sluice box and hopper mounted in such a way that it can rock side to side. Gold bearing gravel is dropped into the hopper which was typically a square shallow box with a metal or wooden screen on the bottom. A miner would then pour water into the hopper. The smaller gravel would pass through the screen and drop into the sluice as the miner continued to pour water into the hopper. The miner would also rock the rocker from side to side. This helped the gold to settle to the bottom of the sluice where it would get caught in the riffles. Once all of the small gravel had passed through the hopper screen, the miner would remove the hopper and dump out the larger rocks after checking visually for larger nuggets. Rockers were popular because they did not require as large of a water supply as was needed to run a regular sluice. Regular sluices needed a good flow of moving water to wash out the gold bearing gravel.

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