| In terms of finance alone, last night was the difference between digging gold or iron pyrites. |
| The cobalt ores at these localities occur with pyrites and chalcopyrite as bands in gneiss. |
| Nodular lumps of pyrites and crystals of selenite are of frequent occurrence. |
| In the fossilisation process, the original organic parts of the shark's tooth are replaced by minerals such as iron pyrites and silica. |
| The ores are argentiferous galena, accompanied by considerable amounts of blende and pyrites, all oxidized near the surface. |
| Iron, in the state of ferric oxide is of less importance, but pyrites and all ferrous compounds are particularly objectionable. |
