Worthless rock, in mining

Usage examples of gangue.

The black tin weighed by the vanner is supposed to correspond in quality with the black tin returned from the floors of the mine for which he is assaying, but this differs materially in different mines with the nature of the gangue.

I have assumed in the calculations that the grains of copper pyrites, for example, were all copper pyrites and the particles of gangue were free from copper.

It is a common gangue mineral in metalliferous deposits, and in the form of crystals is often associated with ores of lead, iron, copper and silver.

When the nature of the impurities will allow it, this process may be shortened to first filtering off the gangue, then precipitating with sulphuretted hydrogen and washing the precipitate on the filter first with water and then with ammonium sulphide.

The more strictly chemical methods are rendered troublesome by the oxide being insoluble in acids, resembling in this respect the gangue with which it is associated.

And that with ores almost free from gangue some quartz or glass should be added to protect the crucible.

Should you see a yellow bilious creature with bloated fausicles, gills crusted with gangue, an impacted clote, who is thereby at fault?

Cugel worked until midnight with his cutters, burnishing irons and reamer, then treated pust, gangue, and timp.