| 1. | The liquid was used in the cleaning process to produce the pyrites
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| 2. | Marcasite reacts more readily than pyrite under conditions of high humidity.
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| 3. | The grains of sperrylite are surrounded by later veins of pyrite.
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| 4. | Deeper ore is pitchblende and coffinite with abundant pyrite and marcasite.
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| 5. | Sulfur will be obtained from pyrites, then gypsum or anhydrite.
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| 6. | Where unoxidized the rhyolite contains abundant pyrite, chalcopyrite and chalcocite.
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| 7. | If it was pyrite, I expect it to bubbles more.
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| 8. | Cobalt occurs as carrollite and cobaltiferous pyrite in approximately equal proportions.
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| 9. | Pyrite was mined in the region in the early 20th century.
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| 10. | The pebbles closer to the water will yield ammonites preserved in pyrite.
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