Rocks and Minerals Question Marathon

rfscoach · Post by **rfscoach** » Mon Oct 24, 2011 10:48 am

sparky007 wrote:
Answer (Click to Show Hidden Text)
Dolostone?

Sorry try again.

cngu23 · Post by **cngu23** » Mon Oct 24, 2011 4:14 pm

Answer (Click to Show Hidden Text)

Pegmatite and its distinctive feature is its unique crystal size

rfscoach · Post by **rfscoach** » Mon Oct 24, 2011 5:12 pm

cngu23 wrote:
Answer (Click to Show Hidden Text)
Pegmatite and its distinctive feature is its unique crystal size

bingo! Your turn.

cngu23 · Post by **cngu23** » Tue Oct 25, 2011 4:56 am

rfscoach wrote:
cngu23 wrote:
Answer (Click to Show Hidden Text)
Pegmatite and its distinctive feature is its unique crystal size
bingo! Your turn.

quizbowl · Post by **quizbowl** » Tue Oct 25, 2011 9:19 am

Azurite!

IdahoSciGuy · Post by **IdahoSciGuy** » Tue Oct 25, 2011 10:29 am

What an awesome specimen! Was that taken at the Natural Science Smithsonian?

cngu23 · Post by **cngu23** » Tue Oct 25, 2011 12:35 pm

quizbowl wrote:Azurite!

Correct.

quizbowl · Post by **quizbowl** » Tue Oct 25, 2011 3:06 pm

SO PRETTY!! omagah. but i digress...

Chemical formula?
Uses?

tornado guy · Post by **tornado guy** » Tue Oct 25, 2011 6:16 pm

Mica, chemical formula is X2Y4–6Z8O20(OH,F)4 and basically it makes anything shine (toothpaste, paint, lip stick etc..)

quizbowl · Post by **quizbowl** » Wed Oct 26, 2011 10:21 am

tornado guy wrote:Mica, chemical formula is X2Y4–6Z8O20(OH,F)4 and basically it makes anything shine (toothpaste, paint, lip stick etc..)

NOPE (chuck testa)

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