fossil in strange gray mineral

[1bear]

I found this mineral on the sea shore (Scotland), it looks greay, when exposed to the light its yellow, what I found interesting,
inside there is a tiny leaf or something like that,
Can you help me to identify this mineral?
Thanks

 

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[Brian T. Booth]

I found this mineral on the sea shore (Scotland), it looks greay, when exposed to the light its yellow, what I found interesting,
inside there is a tiny leaf or something like that,
Can you help me to identify this mineral?
Thanks
<img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=812954"/><img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=812956"/><img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=812957"/>

Interesting find. I think you have is a nodule. I'm not sure what type of nodule. The pattern you are seeing on the nodule is a dendritic weathering pattern. I see this often on many rocks. Nice find.

 

[1bear]

thank you

 

[marinedad]

possible dendritic agate of some sort.

 

[old digger]

Your rock has some similarity to an agate. Here in Montana we have an agate that is called a Moss Agate, which has similar designs as yours. Here is an example of a Montana Moss Agate.