Duncan Gray wrote:
> ...
> 
> Perhaps scratched would perhaps better describe the effect I'm searching
> for. Does anyone out there have access to any well used marbles; can you
> check should I be going for scratched and chipped, or just chipped ?
> 
> ...

Hi

I consider your question very interesting. Even at work I found myself
trying to remember how used marble looked like. I make some tests and
bellow is the result. I think I came more or less close to what I
remember. Maybe it doesn't feet your needs,  but if you are interested I
can post the code.

Alberto.

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