extracting gold from gravel

Various Ways to Recover Gold | CJEnvironmental.com- extracting gold from gravel ,One way to obtain gold is to extract gold from a computer you no longer use; in fact, ... (these are found in a stream or in gravel with dry sand), ...Sand and Gravel Mining Industry | Additional Information ...Sand and Gravel Mining Industry; About Us. Our History; Our ... the first step in extracting the sand and gravel is to clear the surface of vegetation and topsoil and ...