Can you ID this black crystal stuff?

[cole1]

Hi Everyone,

I've been out detecting at the 18th century foundation the past week and have found quite a bit of "odd" things including some buttons and a copper coin that is now a slug. I'll post pics as soon as I get them "presentable." I also found this rock that I thought was pretty cool. Does anyone know what the black crystal stuff is?

 

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[leddel]

hey Cole it didn't give you a tone on the detector did it

 

[weldermark]

from what part of the world was it found,and was it detected with your detector or eyeballs?



Mark

 

[diggummup]

That's what I was gonna ask. It could be a number of things.What state was it found in? How large is it? You don't have a blacklight do you?

 

[cole1]

I found it in SE CT. The site is part of an 18th century stone foundation on an old farm. I eye balled it when I was digging a button up. No tone from the metal detector on it. I just thought it was pretty. We have found quite a bit of folsom points from this site as well. Not to sound ignorant, but what would a blacklight do?

 

[weldermark]

hey Cole,it kind of looks like an oxide know as pyrolusite,which could very well come from that area.
look into it and see what you can find,someone there should know for sure.


Mark

 

[LuckyLori]

It looks like Coal to me.

 

[bakergeol]

Well usually pictures are not enough and we have to go the route of hardness, streak, crystal shape, cleavage for accurate identification. However, an educated guess would be tourmaline. it is readily found in your state.


http://www.uwrf.edu/~wc01/tourmaline.htm

George

 

[cole1]

George, I think you nailed it on the head. That picture of the "spray" looks the same as what I found. Also, Tourmaline has been found in the Salmon River which our creek runs into. Thanks everyone.

 

[Ammietuar]

it kinda looked to me like it was a fossil fish's gill or possibly a fin, but after i looked at your pics some more it looks to thick to be either of those.. id agree with baker on that one i think

 

[diggummup]

I found it in SE CT. The site is part of an 18th century stone foundation on an old farm. I eye balled it when I was digging a button up. No tone from the metal detector on it. I just thought it was pretty. We have found quite a bit of folsom points from this site as well. Not to sound ignorant, but what would a blacklight do?

I was just throwing ideas around.Certain minerals will glow under an ultraviolet light.I'd say George is right though,he's pretty good for a geologist that works for "big oil".

 

[EDDE]

umm coal cole

 

[PBK]

Possibly aegirine?

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