Two possibilities are:
- clay pipe (the smoking type of pipe as opposed to earthenware land drain).
Smoking pipes were (are) made from a variety of natural and/or man-made materials, eg wood and metal. Some of the early manufactued ones were carved from meerschaum - which is a soft white mineral, also called sepiolite. http://en.wikipedia.org/wiki/Meerschaum
They were also made from white clay (fired as in normal pottery-making practice). There's an explanation and some photos here - http://www.devonheritage.org/Places/Kingsteignton/BallClay1.htm
It looks to me like your specimen is part of the bowl of such a pipe. Maybe you can investigate what looks like a charred hole in it. If that is a hole (leading from the pipe bowl to the tube), and the object is roughly eyeball-sized, that's the answer.
Yup there is a hole.!
How could you possibly know all that?:)
Thanks very much for your help. .. Again ðŸ˜ƒ
I know I'm asking a lot of questions but this one has been bothering for a while.
Why do elephant hawk moth caterpillars start off green and then change colour to black and some stay green. ( never saw a big green one but I've seen the pictures.)
I've raised two one was found almost ready to pupate and the other was smaller and still green however it moulted and changed colour overnight.
Thanks a lot for all your help