Rocks & Minerals B/C 2017

Test your knowledge of various Science Olympiad events.
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John Richardsim
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Re: Rocks & Minerals B/C 2017

Post by John Richardsim »

Identify and give crystal structure:
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Unome
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Re: Rocks & Minerals B/C 2017

Post by Unome »

1. calcite 2. trigonal
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Re: Rocks & Minerals B/C 2017

Post by Magikarpmaster629 »

Unome wrote:
1. calcite 2. trigonal
I think you need to start working on a binder or something...look at the cleavage; it's not at all like calcite

John, by crystal structure do you mean crystal system or crystal habit? I'll assume crystal system... 1. Gypsum 2. Monoclinic
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Re: Rocks & Minerals B/C 2017

Post by Unome »

Magikarpmaster629 wrote:
Unome wrote:
1. calcite 2. trigonal
I think you need to start working on a binder or something...look at the cleavage; it's not at all like calcite

John, by crystal structure do you mean crystal system or crystal habit? I'll assume crystal system... 1. Gypsum 2. Monoclinic
Lol yeah I've done absolutely nothing for this event yet. I can ID exactly one mineral consistently (malachite).
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Re: Rocks & Minerals B/C 2017

Post by John Richardsim »

Magikarpmaster629 wrote: 1. Gypsum 2. Monoclinic
Yes, but don't forget to include the variety (it's selenite). Your turn.
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Re: Rocks & Minerals B/C 2017

Post by Magikarpmaster629 »

Unome wrote: Lol yeah I've done absolutely nothing for this event yet. I can ID exactly one mineral consistently (malachite).
Pfft, you've had all summer. No excuses. :P

Anyway:
Image
I like to call this one the "dried seaweed" mineral
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Re: Rocks & Minerals B/C 2017

Post by Unome »

Olivine?
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Re: Rocks & Minerals B/C 2017

Post by Magikarpmaster629 »

Unome wrote:
Olivine?
Makes sense, but nope; try again!
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Re: Rocks & Minerals B/C 2017

Post by Unome »

Epidote?
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Re: Rocks & Minerals B/C 2017

Post by Magikarpmaster629 »

Unome wrote:
Epidote?
Yep!
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