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Re: Rocks and Minerals Question Marathon

Posted: November 19th, 2012, 1:12 pm
by Wadhk
1. Malachite and Azurite, 2. monoclinic

Re: Rocks and Minerals Question Marathon

Posted: November 19th, 2012, 7:04 pm
by thsom
Wadhk wrote:
1. Malachite and Azurite, 2. monoclinic
Yup! maybe we should show why though, so we can see reasoning. So, why?

Re: Rocks and Minerals Question Marathon

Posted: November 22nd, 2012, 6:41 am
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.

Re: Rocks and Minerals Question Marathon

Posted: November 22nd, 2012, 7:41 am
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

Re: Rocks and Minerals Question Marathon

Posted: November 22nd, 2012, 11:16 am
by RocksAndMinerals
1st image is not azurite.
2nd image was correct in your response.

Re: Rocks and Minerals Question Marathon

Posted: November 22nd, 2012, 12:16 pm
by hotchocolate123
sorry, I meant apatite :)

Re: Rocks and Minerals Question Marathon

Posted: November 23rd, 2012, 12:23 pm
by tuftedtitmouse12
ignore

Re: Rocks and Minerals Question Marathon

Posted: November 23rd, 2012, 2:44 pm
by hotchocolate123
Sorry for the long wait :)
[img]http://www.johnbetts-fineminerals.com/jhbnyc/gifs/41037.jpg[/img]

Re: Rocks and Minerals Question Marathon

Posted: November 23rd, 2012, 3:01 pm
by 10manwire
Topaz

Re: Rocks and Minerals Question Marathon

Posted: November 23rd, 2012, 4:18 pm
by hotchocolate123
Yes ! :D
Your turn