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petefromhackney

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Reply with quote  #1 
I found this two weeks ago on the foreshore at base of cliffs Bouldnor on the Isle of Wight.  Is it turtle shell, bone fragment ?  What do you think. DSCN4384.jpg  DSCN4385.jpg  DSCN4386.jpg  DSCN4387.jpg   
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P King Chef

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Reply with quote  #2 
Looks like a piece of pottery to me.
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prep01

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Reply with quote  #3 
I agree, certainly not fossil, so I would say pottery.
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Colin Huller
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Reply with quote  #4 
Hi

You can get turtle shell there, the photo is not really showing the signs of turtle shell.
You do get lines on the shell. Can you can see a honeycomb struction in the middle when you look edge On? Your photo is a bit dark. I have not seen turtle shell that shape or with the texture shown on your photo however.

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andrasz

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Reply with quote  #5 

Hmmm...

Would need to hold it in hand to feel texture, weight, etc. The shape does resemble a piece of waterworn ceramics, but the colour does not appear right, it does resemble that of old (not necessarily fossilised) bone. I have seen ice age mammoth tusks disintegrate in that manner, would leave that as an option until disproven. 

Edit:

Another option is that it's a fragment on an Aetobatis (Eagle ray) tooth plate, the shape and striations are very reminescent of much smaller ones I have from the Oligocene of Fayum (Egypt). If indeed it is a part of a tooth plate, it is HUGE, but modern species of the genus do grow to 3 metres, they may well have been much larger in the past, I'm no expert on them.

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Reply with quote  #6 
Another thought, try taking photos in natural light, the first ones are a bit too dark to make out the surface
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P King Chef

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Reply with quote  #7 
A piece of black burnished ware maybe? Certainly not turtle related.
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