GeologyRocks

I've never seen anything like the pictures you've just posted! Bizarre!

I don't think they are meterorites either. Some kind of igneous formation is my guess, but I'm at a loss to explain the surface texture in the first image.

Sorry I'm not more help - hopefully someone else can help a bit more! 

it's like a fur cone! Very strange indeed.

Jon amd Hiddenpath,

Actually Both responses at least confirm I am not stupid or Crazy(well, at least when it comes to these rocks)

Everytime I think I have found the identity there is some sublte difference to void it all together.

Thanks, I appreciate you all taking the time to have a look see.

When I saw this, I thought "cystoid", but I guess you're not in a limestone-type area and it would represent a mineral replacement of the original limestone (they are found in Oklahoma). http://www.fossilcrinoid.com/cystoid.html

I also thought "weathered garnet", but that's only a guess.

it does look quite like those "cystoids"

Except for the color that looks like the rocks I have.

 Thanks

Here is one more.  

That ones like a cannonball! It is very like that fossil, but your's seems to have a pattern to its texture where as the white one seems just knobbly.

Can you cut one in half?  That would help, knowing the internal structure.  Also, I forgot to ask how big these things are.

My guess is that they are marcasite nodules FeS₂ - sedimentary concretions.

see http://en.wikipedia.org/wiki/Marcasite

here is an inside view and another scale view of many of the rocks. The Marcasite reference below is what the inside looks like exatcly only rust and black colored. I think that is the rock.

I forgot about the scale, sorry.  

Thanks again for taking a look.  

Hello,

 I'm almost sure that this is a piece of marcasite, like I've found in France, on the coast of Cap Blanc Nez. When they are not rusty, they shine like silver, when you split them (like the picture below).

 Greetings Bram. 

They kind of look like the two copralites that I found in Folkestone Warren. Maybe thats what they are?

 Sorry I can't help more.

Geo-Girl Out. 

That be them.  I tried to oxidize and/or clean up the inside  of one of the broken ones. Not even Taco Bell Firey Sauce made a differernce in the inside color. BUt, the texture of both the inside and outside are dead on. Even the outside color looks close, I have moany more of different shades and one 'Jet Black.'

 Thanks

Grajek 

Is that your picture, bram? If so, it'd be great to add to our picture gallery, seeing as not many people knew about this (me included)!

Hello Grajek,

 Maybe you can try to split one of them with a chisel and a hammer, then, when lucky, you can get the same quality as on the picture I posted. But when you are unlucky it is only rust inside. To avoid  rusting you can preserve it by spraying hairspray on the surface, where you splitted it.

Hello Jon,

Yes, it is my picture. I resized it before posting, but I can send you the original (1024X768).

 Greetings Bram.

You can actually add the picture to the site yourself. Click "Add Content" (on the left or above). Then click image and add your image by filling in the form - easy (I hope!). I'll then publish it and that's it

Let me know if you have any difficulties. 

I submitted the photo.

 Greetings Bram.

Just published it - thanks very much

I have wondered about that. I was not sure that it would be anyother color than rust. But with the quantity of photos I have seen here and on the net I am going to give it a try. I have one last Question. All the pictures I have seen of marcasite have been round. The outcroppings(more of cluster)  I seem to always find these have many different shapes. Is it still marcasite even it's flatter or some other shape?

Hello Grajek,

Marcasite can have many different shapes, from completely round to "sausage-like", but it is still marcasite. It can also be entirely smooth (without out-croppings).

Greetings Bram.

Hello again,

I've made a photograph of a few pieces of marcasite showing the variety of shapes. I found them all at Cap Blanc Nez, France.

Greetings Bram.

Yeah that is what I tend to find only some are more rusted than others. I am going to try and open up a whole one. I have forgot I had been finding them, boiling them and then dropping in my fish tank. I have pleanty to play around with now.

Thank Again

Grajek 

weird. I've never seen anything like it. it has rounded bumps so it is probably igneus.

Those next ones kinda look like small iron meteorites. Play around with them. U'll figure it out eventually.

Oh and by the way, if they are heavy and a magnet sticks to them, they are almost definately an iron meteorite.

IMHO they are almost definitly smth else if a magnet sticks to them. Why? Meteorits are so rare to find chances are it is always smth else unless you go searching in known locations like Saudi desert or Antarctica.

Also, all samples i have seen in this thread are definitly of terrestrial origin. None show and sign of external melting or deformation as it may be expected from a meteorite. Black color may often be to iron oxides or manganese on the outside.

 Most if not all rocks shown are likely some sort of concretions or nodules.