Separating minerals by density alone, with no chemistry involved.
A mineral processing technique that uses differences in specific gravity to separate heavy valuable minerals from lighter waste minerals. Common methods include jigs, spirals, and shaking tables, often used as a first stage in gold recovery.
Where it works it is the cheapest recovery there is, and coarse free gold responds to it well. A gravity circuit recovering a meaningful share of the gold ahead of leaching materially improves overall economics.