Hi. I found this in Skegness. It is a piece of flint, but there is a strange fossil/rock inside it.
If it's an Echinoid, or any fossil, how could I prepare it? Can flint fossils be prepared? Could I use a weak acid which would remove the flint?
Sorry if the pictures aren't very good; it's quite small so it was hard to take a good picture.
Yes, it could be an echinoid, but it could also be some other type of shell - really difficult to tell.
I don't know of a chemical way to selectively remove the flint (and the fossil itself may also be flint).
Non-chemically... It would be difficult, too. I think you'd have to use a grinding technique (using carborundum or diamond powder as the abrasive). That would be tricky/risky, especially without training/practice and the right tools. Even then, the chances of accidental breakage would be significant.
Some things, you just have to leave as a mystery!
As Mike says - some things you just have to leave as a mystery.
Flint won't prep like other rock were you have a weak point around your fossil, but flint will readily shatter straight through the fossil.
I agree with Mike, either echinoid or a shell. Use a loupe to look at the structure, if it has lots of bumps on it then it could well be an echinoid. If it is smooth it will be a shell of some sort. Flint is difficult to prepare, does not look like your specimen could have anything done to it. You could give it a few hits with your hammer but it will most likely break.
Thanks for the reply. I've decided to use a weak acid (vinegar) to prepare it. I've put it in vinegar for about 12 hours, and now I can see some spine-like things sticking out of it (about 3 of them.) I'm going to put it in vinegar for a bit longer so helpfully it will work. I'll either post some images tomorrow or the day after.
Hi again. I've done some research on the internet and it says to leave it in the vinegar for several days, so I've decided to take it out of the vinegar on Thursday, so I'll post some images on Thursday or Friday.