Rocks & Minerals B/C

[bonysteak]

I wanted to post my own picture from my desktop but couldn't figure out how D:

ID and chemical formula (Click to Show Hidden Text)

[img]http://www.mindat.org/hpthumbs/HP_237319_565_424.jpg[/img]

You could try uploading your pictures to a free image hosting site. Then you could take the image URL from there to display it here.

Answer (Click to Show Hidden Text)

Assuming the white mineral the main crystal in the picture is on is quartz - SiO2, that would make the green crystal Epidote - Ca2(Al,Fe)2(SiO4)3(OH) by process of elimination because Olivine and Quartz don't like forming together due to their opposite ends in the Bowen's reaction series.

I hate the green minerals in this event.

YO YOU GOT IT GOOD JOB also thanks for that tidbit of information I did not know that before (both tidbits, I guess...both the photo thing and the quartz thing)

Your turn!

[Jamerz]

Heya, I'm pretty new here. So...how does this work? Do we just test each other on rocks and minerals?

[Unome]

Heya, I'm pretty new here. So...how does this work? Do we just test each other on rocks and minerals?

Welcome to the forums!

Question Marathon Explained. R&M (as with most events) follows the "wait until the person confirms your answer" method.

[John Richardsim]

Aight, let's get this going again.


ID:

[arvind_r]

Is this Bornite?

[John Richardsim]

Is this Bornite?

Try again.

[asthedeer]

Is this Bornite?

Try again.

Chalcopyrite?

[John Richardsim]

Chalcopyrite?

Yep, your turn.

[Jamerz]

Wait, how do I make it that black text box thing?

[Unome]

Wait, how do I make it that black text box thing?

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