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To recover heavy minerals from depth, with a device that employs a vacuum to first collect material and a further device or series of devices, to classify and concentrate minerals of greatest density

The flow of water as influenced by gravity

A mineral concentration device that uses a catching net, or bucket tied to a long rope, to collect heavy minerals in moving current. Used for recovering placer minerals in creeks and rivers and usually for testing purposes

An intrusion of magmatic rock forming between fractures of earlier rock

A term used to describe minerals capable of bending and reshaping without breaking