Thanks, Ross. I think I can see what you mean, but I'm afraid the pencil method would a be disaster on this 'satinised' surface, so I don't want to risk it, and looking at that area with a loupe it's obvious that there's nothing but the creases in the surface of the 'rock'
Lily, I like your 'womb-with-a-view idea, although in 3D it looks more like an 'Aladdin's Cave' to me
The more I examine this weight the more it looks to me as if it was made in some sort of a mould! I keep looking at it and trying to imagine how exactly it would have been made :huh: Having seen a good few paperweights (and other glass objects) made, I know a little of the processes needed to create certain effects, and I'm definitely thinking that, while it looks like a 'blob' of glass, that effect could well be contrived with the use of a mould
But that would imply there would be a number of this type of weight about! Has anyone else ever seen one? Or am I on completely the wrong track? (Very possible!