Rocks & Minerals B/C

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Rocks & Minerals B/C

Postby SenseiSushi » September 6th, 2016, 1:43 pm

Short Event Description: "Teams will use their knowledge of rocks and minerals to identify pictures/specimens and complete a written test."

What type of cleavage is present in obsidian?
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Re: Rocks & Minerals B/C

Postby Magikarpmaster629 » September 6th, 2016, 3:12 pm

Trick question!
None. It's a rock, not a mineral.
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Re: Rocks & Minerals B/C

Postby bhavjain » September 8th, 2016, 9:45 pm

I'm gonna go since nobody posted yet :D

Identify the following, classify it as a mineral, or rock. If it is a mineral, give its chemical structure. What is responsible for the color patterns?
[img]https://s-media-cache-ak0.pinimg.com/564x/8d/f6/0c/8df60cd7820274f2020a8b43d6c54b9f.jpg[/img]
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Re: Rocks & Minerals B/C

Postby a boy » September 8th, 2016, 10:34 pm

[list][*]1. Opal (mineral) [*]2. SiO2 * nH2O [*]3. Internal structure diffracts light, causing it to display many colors at once[/list]
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Re: Rocks & Minerals B/C

Postby bhavjain » September 9th, 2016, 3:43 am

a boy Correct. Your turn.
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Re: Rocks & Minerals B/C

Postby bhavjain » September 10th, 2016, 4:05 pm

I'm gonna go since a boy didn't post.
[img]https://s-media-cache-ak0.pinimg.com/736x/ff/30/23/ff302376f5388ded0ea94746487a472c.jpg[/img]
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Re: Rocks & Minerals B/C

Postby Cherrie_Lan » September 10th, 2016, 6:24 pm

Corundum?
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Re: Rocks & Minerals B/C

Postby bhavjain » September 10th, 2016, 6:30 pm

Cherrie_Lan Incorrect.
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Re: Rocks & Minerals B/C

Postby asthedeer » September 10th, 2016, 6:34 pm

I'm gonna go since a boy didn't post.
[img]https://s-media-cache-ak0.pinimg.com/736x/ff/30/23/ff302376f5388ded0ea94746487a472c.jpg[/img]
The first thought I had was tourmaline, but maybe it's beryl, else I'm completely wrong :P
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Re: Rocks & Minerals B/C

Postby bhavjain » September 10th, 2016, 6:45 pm

asthedeer Tourmaline is correct, specifically liddicoatite. Anyone know if we have to know the specific minerals of the Tourmaline group?
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