How do separate gold and gravel particle?

One method to separate gold and gravel particles is by using a gold pan, where the heavier gold particles will settle to the bottom while the lighter gravel particles can be washed away. Another method is using a sluice box, which utilizes flowing water to separate the heavier gold from the lighter gravel. A third method is to use a gold trommel, which screens out the larger gravel particles while allowing the smaller gold particles to pass through.