Once again, after a lapse of about 50 years, there is widespread recognition of the importance of understanding and improving the treatment of particles by gravity concentration. An attempt is made here, therefore, to analyze the literature on intermediate and fine particle gravity concentration comprehensively and critically, in order to bring the current stage into perspective. The areas covered are sluicing, spiral concentration, tabling and slime gravity concentration. The underlying mechanisms of the above unit processes, interrelationships among the involved variables, development and design of the relevant equipment and also their application, are discussed. The behavior of the particles in sluicing, spiral concentration and tabling are examined in detail on the basis of the fundamental knowledge available in mineral processing and fluid and particulate dynamics.