Rocks and Minerals Question Marathon

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Wadhk
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Re: Rocks and Minerals Question Marathon

Post by Wadhk »

1. Malachite and Azurite, 2. monoclinic
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Re: Rocks and Minerals Question Marathon

Post by thsom »

Wadhk wrote:
1. Malachite and Azurite, 2. monoclinic
Yup! maybe we should show why though, so we can see reasoning. So, why?
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Re: Rocks and Minerals Question Marathon

Post by RocksAndMinerals »

I like to think of Malachite being "fuzzy" (or circular, ringed, and very smooth) and green. Azurite is blue and "rocky" and it comes along with Malachite, just like the picture.

Image
Image


Identify both and describe how you arrived at your conclusion.
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Re: Rocks and Minerals Question Marathon

Post by hotchocolate123 »

Ummm the first would be apatite because... well, heres my thought process --> 1) if it's blue it's either azurite, apatite, celestite, fluorite, or tourmaline 2) I ruled out azurite because azurite is usually opaque where this mineral is translucent 3) celestite, fluorite, and tourmaline can't possibly be it because of their cleavage and crystal habit 4) therefor it's azurite

I did the same process for the second but sodalite just popped into my head because sodalite is opaque and dark blue in color
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Re: Rocks and Minerals Question Marathon

Post by RocksAndMinerals »

1st image is not azurite.
2nd image was correct in your response.
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Re: Rocks and Minerals Question Marathon

Post by hotchocolate123 »

sorry, I meant apatite :)
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Re: Rocks and Minerals Question Marathon

Post by tuftedtitmouse12 »

ignore
peter, peter, peter
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Re: Rocks and Minerals Question Marathon

Post by hotchocolate123 »

Sorry for the long wait :)
[img]http://www.johnbetts-fineminerals.com/jhbnyc/gifs/41037.jpg[/img]
2014 Nationals:
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2013 Nationals:
Forestry (4) Heredity (9) Rocks & Minerals (5)
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Forestry (3) Rocks & minerals (7) Aquifers (13)
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Re: Rocks and Minerals Question Marathon

Post by 10manwire »

Topaz
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Re: Rocks and Minerals Question Marathon

Post by hotchocolate123 »

Yes ! :D
Your turn
2014 Nationals:
Heredity (5th) Water Quality (7th)
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Forestry (4) Heredity (9) Rocks & Minerals (5)
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Forestry (3) Rocks & minerals (7) Aquifers (13)

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