Linked from
The 12 pages that link to Gravity separation, each with the reason it gives.
GangueRelated: Density contrasts can help separate gangue from heavier valuable minerals.
ChromiteRelated: Chromite’s high density enables concentration from lighter gangue minerals.
Ore dressingRelated: Dense mineral grains can be separated from lighter gangue using water or air.
WolframiteRelated: Wolframite's high density makes gravity methods useful in ore concentration.
Vapor–liquid separatorRelated: The vessel slows flow so denser liquid can settle while vapor rises.