Quartz ID Please!

[SlowFrog]

Hi, I broke open some Irish quartz because the outside looked weird to me and I wanted to see what was inside. You can see the broken fragments in the first pic - the brownish, thin layers are where the quartz naturally broke. I'm not quite sure what it is - just hardened dirt?

After cleaning with a toothbrush and looking through a magnifying glass, I spotted some silvery deposits. Any idea what they might be?

 

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[Al D]

Looks like pyrite

 

[blauer]

I agree with Alan, Pyrite.

 

[SlowFrog]

Thank you both! I always thought of pyrite as the yellow gold impostor so I didn't really consider it due to the silvery appearance of the deposits. I'm an absolute novice so appreciate the replies.

 

[blauer]

Thank you both! I always thought of pyrite as the yellow gold impostor so I didn't really consider it due to the silvery appearance of the deposits. I'm an absolute novice so appreciate the replies.

I've found pyrite that was silver colored and once I found a hunk that was almost completely white. I took the specimen to a local geologist just to be sure because it looked so different than any I found before. Sure enough FeS! Wish I still had it but it got lost a couple of years ago (stolen collection).

 

[smokeythecat]

Pyrite or perhaps the related arsenopyrite, pyrite with some arsenic added in.