Rocks and Minerals Question Marathon

[10manwire]

ANYONE?

If not, I'll just say what it is... And you'll probably be surprised.

[aznluvsricemhm]

er...I can't see it... >.>

[tornado guy]

er...I can't see it... >.>

I couldn't either, so I quoted it and copied the link and found the picture that way.

[10manwire]

This is the url, if you need it...

http://www.mindat.org/photos/0965242001248159497.jpg

Tornado guy, do you know what it is?

Hint: It's very close to Wadhk's guess

[tornado guy]

Is it limonite? I saw a piece of limonite similar to the looks of the mineral one you posted..

[10manwire]

Yup. But, you have to answer the entire question first.

[aznluvsricemhm]

limonite
ore of iron
orthorhombic crystal structure
im not quite sure as to what you mean by saying aggregates
but limonite forms very fine aggregates, Pyrite, Siderite, and Marcasite?
idk

[10manwire]

Right-o.

C. Is actually amorphous.
D. Looking for: earthy, massive, botryoidal, mammilary stalactitic, and fibrous

[aznluvsricemhm]

ah
i see
can I still post one?

[aznluvsricemhm]

so... (Click to Show Hidden Text)

what is the crystal structure? What is a way to identify it? What is the color of it's streak? (for this one, I can accept many answers) [code]http://www.redorbit.com/media/uploads/2004/10/28_0ac371f570a8e0129ff11833b1cf20c7.jpg[/code]

if you can't click the link
just copy and paste