Rocks and Minerals Question Marathon

eox
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Re: Rocks and Minerals Question Marathon

Post by eox » 

[img]http://img535.imageshack.us/img535/7081/snowflakeobsidian.jpg[/img]
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melissay63
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Re: Rocks and Minerals Question Marathon

Post by melissay63 »

ya...ur turn
So far...medaling has been a rollercoaster
but hopefully, next one would be on top!
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starfield
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Re: Rocks and Minerals Question Marathon

Post by starfield » 

snowflake obsidian?
2012 states:
Rocks and Minerals: 2nd
Towers: 6th
Helicopters: 4th
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quizbowl
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Re: Rocks and Minerals Question Marathon

Post by quizbowl »

starfield wrote:
snowflake obsidian?
And it is! They're formed from small inclusions of cristobalite (white radially clustered crystals) in the obsidian. Interesting stuff.
2010: 5th 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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starfield
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Re: Rocks and Minerals Question Marathon

Post by starfield »

New question!

Identify the mineral another mineral that has the same chemical formula
Image
2012 states:
Rocks and Minerals: 2nd
Towers: 6th
Helicopters: 4th
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solakmagic
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Re: Rocks and Minerals Question Marathon

Post by solakmagic »

That there is a sample of Aragonite, polymorphous with Calcite; my reasoning is the distinctive crystal shape, and the fact that it must be polymorphous with something :D
"Genius is one per cent inspiration, ninety nine per cent perspiration" - Thomas Alva Edison
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melissay63
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Re: Rocks and Minerals Question Marathon

Post by melissay63 »

thought it was fluorite at first glance
So far...medaling has been a rollercoaster
but hopefully, next one would be on top!
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starfield
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Re: Rocks and Minerals Question Marathon

Post by starfield »

solakmagic wrote:That there is a sample of Aragonite, polymorphous with Calcite; my reasoning is the distinctive crystal shape, and the fact that it must be polymorphous with something :D
correct!
2012 states:
Rocks and Minerals: 2nd
Towers: 6th
Helicopters: 4th
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wufactor2012
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Re: Rocks and Minerals Question Marathon

Post by wufactor2012 »

I am new, can i post one?
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hexagonaria
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Re: Rocks and Minerals Question Marathon

Post by hexagonaria »

It is standard procedure to let the last person who answered correctly post the next question, but since it has been a few days, I say go for it newcomer.
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