Limonite and galena?
Rocks and Minerals Question Marathon
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Wadhk
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Re: Rocks and Minerals Question Marathon
2014 Events: Entomology, Materials Science, Rocks and Minerals, Scrambler
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10manwire
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Re: Rocks and Minerals Question Marathon
Right on the dot. 
"If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." ~ Henry David Thoreau
"We shall never know all the good that a simple smile can do." ~ Mother Teresa
"We shall never know all the good that a simple smile can do." ~ Mother Teresa
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Wadhk
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Re: Rocks and Minerals Question Marathon
2014 Events: Entomology, Materials Science, Rocks and Minerals, Scrambler
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10manwire
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Re: Rocks and Minerals Question Marathon
Barite? (or Baryte)
"If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." ~ Henry David Thoreau
"We shall never know all the good that a simple smile can do." ~ Mother Teresa
"We shall never know all the good that a simple smile can do." ~ Mother Teresa
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Wadhk
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Re: Rocks and Minerals Question Marathon
Yup.
2014 Events: Entomology, Materials Science, Rocks and Minerals, Scrambler
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10manwire
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Re: Rocks and Minerals Question Marathon
"If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." ~ Henry David Thoreau
"We shall never know all the good that a simple smile can do." ~ Mother Teresa
"We shall never know all the good that a simple smile can do." ~ Mother Teresa
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quizbowl
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Re: Rocks and Minerals Question Marathon
Hematite
2010: 5th in NYS
2011: 4th in NYS
2012: 3rd in NYS
2011: 4th in NYS
2012: 3rd in NYS
<quizbowl> ey kid ya want some shortbread
<EASTstroudsburg13> I don't know why, but I just can't bring myself to delete this post.
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10manwire
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Re: Rocks and Minerals Question Marathon
Yup.
"If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." ~ Henry David Thoreau
"We shall never know all the good that a simple smile can do." ~ Mother Teresa
"We shall never know all the good that a simple smile can do." ~ Mother Teresa
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LoopQuantumGravity
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Re: Rocks and Minerals Question Marathon
What is the most common mineral on Earth, and what [i]subclass[/i] of silicates does it belong to?
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Wadhk
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Re: Rocks and Minerals Question Marathon
Quartz, tectosilicates. If this is correct, quizbowl can post the next question.
2014 Events: Entomology, Materials Science, Rocks and Minerals, Scrambler