Rock for ID

[IndianRiverSonrise]

I found this rock or whatever on a East Coast Florida Beach where I find many fossil bones and a few Indian points. I am wondering if this is chert or flint. I've never seen any other rocks like it there. Maybe it was brought in by the Indians, but I don't think it would flake well. It seems to be made of definite thin layers. I don't know. I think you can get an approximate size by comparison to my hand.

Any help would be appreciated. Thanks.

 

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[Eu_citzen]

Black chalcedony maybe?

 

[IndianRiverSonrise]

any chance it is teeth and jawbone?

That is what I thought when I first picked it up, but after examining it more closely, I don't think so.

 

[strickman]

looks like a fossil.

 

[Eu_citzen]

Black Chalcedony: http://www.xmission.com/~jbdaniel/assets/flint.jpg

 

[IndianRiverSonrise]

Black Chalcedony: http://www.xmission.com/~jbdaniel/assets/flint.jpg

fossil teeth still look closer...just my own opinion.

I'm don't know much about identifying either rocks or fossils. I find them and then have to do my research. But I was looking at the chalcedony sites and my rocks and gems book and found that coral and a bunch of other stuff can be silicized (?). They were talking a lot about agatized coral. But it looks to me that under the right conditions an object could be both a fossil and chalcedony, or something very close to it. Like I said, I don't know about this stuff and could be completely wrong. I'm definitely benefitting from the discussion and opinions. I had one other item that I asked about in the fossils forum and someone said that the other item could be a complete opal replacement fossil. So maybe this is something simiar.

Thanks for the opinions and leads. I'm following up on them to see what I can learn.

What do you make of the white layer around the edge that is seen in the first photo?

 

[geo4472]

i think fossil teeth

 

[DanB]

My first thoughts that came to mind was teeth from some sort of marine animal......something very BIG......nice find.

db

 

[IndianRiverSonrise]

i think fossil teeth

hmmm.... I have found part of a mastadon tusk in the same area and I can see similarities there.

 

[Eu_citzen]

Black Chalcedony: http://www.xmission.com/~jbdaniel/assets/flint.jpg

fossil teeth still look closer...just my own opinion.

I'm don't know much about identifying either rocks or fossils. I find them and then have to do my research. But I was looking at the chalcedony sites and my rocks and gems book and found that coral and a bunch of other stuff can be silicized (?). They were talking a lot about agatized coral. But it looks to me that under the right conditions an object could be both a fossil and chalcedony, or something very close to it. Like I said, I don't know about this stuff and could be completely wrong. I'm definitely benefitting from the discussion and opinions. I had one other item that I asked about in the fossils forum and someone said that the other item could be a complete opal replacement fossil. So maybe this is something simiar.

Thanks for the opinions and leads. I'm following up on them to see what I can learn.

What do you make of the white layer around the edge that is seen in the first photo?

Chalcedony is a Quartz variety. And includes among other Flint, Agate... And a bunch more.
Pretty certain it ain't opalized though, wrong lustre. The lustre is very similar to chalcedony.
Basically it describes any micro-crystalline quartz.

Tee, it might be a tooth or several.. However I think the material its made of is Chalcedony.
I don't know enough about fossils to say anything regarding that.

 

[IndianRiverSonrise]

i think fossil teeth

Since so many guys were thinking fossil, I decided to post the photos on the fossil forum.

Harry Pristus, who has identified many fossils that I've posted says that it is a section of a mastadon molar.

Thanks to all of you guys for all of the help. I learned a lot from the experience.