Rocks and Minerals Question Marathon

[quizbowl]

Good job! On a side note, I seem to often mix up Chalcopyrite with Bornite anyone have any visual aids between them? (It's still your turn, XX)

[XXGeneration]

Good job! On a side note, I seem to often mix up Chalcopyrite with Bornite anyone have any visual aids between them? (It's still your turn, XX)

I like to think that Chalcopyrite has more of a yellowish tinge to it while Bornite is mainly just a darker color

Question 5:


Identify the mineral and state the crystal system to which it belongs.

[mingtian]

Quiz and xx, are you using your binder or is this pure memory?

[XXGeneration]

The marble and bornite ID was mostly from memory; the bornite formula and the magma question were both from my binder.

Mainly I want to be able to ID and recall main facts such as nicknames from memory. The rest can be from my binder.

[iYOA]

Question 5 Answer (Click to Show Hidden Text)

The pinkish mineral is feldspar and it can either be monoclinic or triclinic(but i think orthoclase feldspar is monoclinic).
EDIT:  The other mineral is Biotite and it is also monoclinic. lol at first i thought it was slate

I might not have internet access for 24hrs after 12pm so if anyone is feeling impatient they may post a question in my place after my answer is verified.

[XXGeneration]

Question 5 Answer (Click to Show Hidden Text)

The pinkish mineral is feldspar and it can either be monoclinic or triclinic(but i think orthoclase feldspar is monoclinic).
EDIT:  The other mineral is Biotite and it is also monoclinic. lol at first i thought it was slate

I might not have internet access for 24hrs after 12pm so if anyone is feeling impatient they may post a question in my place after my answer is verified.

I was not asking about the pinkish mineral, so I'm not sure if that's correct; however, your identification of the black mineral is correct!

[iYOA]

Here is the next question:

Question 6 (Click to Show Hidden Text)

[img]http://tiny.cc/1o6jl[/img]
[img]http://library.thinkquest.org/05aug/00461/images/lepidolite.jpg[/img]

a) Identify it.
b) Which mineral group does it belong to? 
c) It is the principle ore mineral for which alkali metal?

[quizbowl]

Answer (Click to Show Hidden Text)

a) Identify it. --> Lepidolite?
b) Which mineral group does it belong to? The mica group (which makes it a phyllosilicate)
c) It is the principle ore mineral for which alkali metal? Lithium

[iYOA]

a and b are correct. however c is actually rubidium.

[quizbowl]

a and b are correct. however c is actually rubidium.

Oh, didn't see principle XD