| gahnite |
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noun (uncountable)
- (mineralogy) A rare mineral ZnAl?2O4 in the spinel group.
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| galena |
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noun
- (mineralogy) A mineral, lead sulphide (PbS?), used as an ore for lead.
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| Galenic |
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adjective
- of, or relating to w:Galen, Galen, his followers, principles or practices, especially relating to vegetable preparations used as remedies
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| gaylussite |
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noun - (mineralogy) a saline evaporite, consisting of a mixed sodium and calcium carbonate
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| glauberite |
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noun - (mineralogy) a saline evaporite, consisting of a mixed sodium and calcium sulphate
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| grahamite |
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noun
- One who follows the dietetic system of w:Sylvester Graham, Sylvester Graham
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| graphite |
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noun
- An allotrope of carbon consisting of planes of carbon atoms arranged in hexagonal arrays with the planes stacked loosely. Used as a dry lubricant, and in lead pencils. Is edible.
- A composite plastic made with graphite fibers noted for light weight strength and stiffness.
- A grey colour.
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| gummite |
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noun - (mineralogy) a yellow, amorphous mineral, a mixture of oxides and silicates of uranium, formed by weathering of pitchblende
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| gypsum |
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noun
- A mineral consisting of the hydrated calcium sulphate. When calcined, it forms plaster of Paris.
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