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Abominon
Found this today on the beach near Warkworth, Northumberland. 
It's only 2cm. Very small. And as you can see it has something on both sides (I personally think they look like a set of teeth, maybe that of a fish, but I'm no expert and for all I know it could just be a funny looking rock!! Thank you! Click image for larger version - Name: 20191102_190654.jpg, Views: 38, Size: 61.67 KB
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TqB
It's a section through a hollow crinoid stem - it'll be Carboniferous in age.
Tarquin
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Abominon
Very intelligent reply thank you.
So is it classed as a fossil?
How many years ago is Carboniferous?
And is a Crinoid actually an Animal not a Plant?
Thanks again
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TqB
It's most definitely a fossil! It's from the lower Carboniferous, 330-345 million years.
Crinoids are animals related to starfish and sea urchins. Broken bits of them very common in some rocks, including parts of the Carboniferous, though whole specimens are rather rare.
The fragments are sometimes major rock forming elements in themselves, as in this pebble - yours is probably from a similar rock (usually limestone).
IMG_3268.jpeg
Tarquin
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Abominon
WOW. Amazing, thank you very much!
As a kid I've always loved anything in relation to fossils etc and dinosaurs, happy I found this forum. 
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