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Gangue

Used to describe all non economic or waste rocks and minerals surrounding economic minerals within

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Galvanize

To coat an object with zinc as to prevent oxidation states from occurring, such as rust

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Germanium

A grayish-white metallic element used in semiconductors and alloys

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Gage, gauge

The measurement of space between a sieve through which the majority of aggregate will pass

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Geophysical survey

A physical evaluation of rocks by the measurement including magnetism, conductivity, specific gravity and radioactivity

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Gadolinite

A weakly radioactive monoclinic mineral which occurs in granites and granite pegmatites

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Geophysics

The measurement of physical properties in rocks and minerals