Rocks & Minerals B/C 2017

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John Richardsim
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Re: Rocks & Minerals B/C 2017

Postby John Richardsim » September 5th, 2016, 12:26 pm

Identify and give crystal structure:
Image
Si Quaeris Peninsulam Amoenam Circumspice

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Re: Rocks & Minerals B/C 2017

Postby Unome » September 5th, 2016, 1:32 pm

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

Postby Magikarpmaster629 » September 5th, 2016, 2:06 pm

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

Postby Unome » September 5th, 2016, 2:18 pm

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

Postby John Richardsim » September 5th, 2016, 3:14 pm

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

Postby Magikarpmaster629 » September 5th, 2016, 4:17 pm

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

Postby Unome » September 5th, 2016, 4:29 pm

Olivine?
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Re: Rocks & Minerals B/C 2017

Postby Magikarpmaster629 » September 5th, 2016, 5:03 pm

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

Postby Unome » September 5th, 2016, 5:09 pm

Epidote?
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Re: Rocks & Minerals B/C 2017

Postby Magikarpmaster629 » September 5th, 2016, 5:50 pm

Epidote?
Yep!
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