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Jt also somewhat resembles chalcopyrite, but chalcopyrite brittle, and gives a green flame. Gold is also taken for pyrite or iron pyrites, but the latter is quite light in color, and light in specific gravity when compared with gold, and is brittle. Iron...

Practical Mineralogy Simplified: For Mining Students, Miners and Prospectors - Pagina 15
door Jesse Perry Rowe - 1911 - 162 pagina’s
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The Mining World, Volume 32

1910 - 822 pagina’s

...a good cleavage, and is not malleable. It also somewhat resembles chalcopyrite, but chalcopyrite is brittle, and gives a green flame. Gold is also taken...exception of the color ; as gold containing a good per centSpecific gravity, 9. Hardness, 2.5, or nearly the same as sylvanite. Color, bronze-yellow,...

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