Interesting question.

My first thought would be to find someone with a waterjet to cut the slabs
for you. "Maybe" you could cut it with a diamond bladed tile saw, depending
on the thickness of the glass.

But, this glass is (probably) "pyrex", and I don't know if it could even be
cut without shattering. It might have to be re-annealed first? Some of the
glass blowers around here might know about that.

If you can get it cut, then you'll have to have it polished, as the saw
blade or water jet will leave a surface that looks like the glass has been
sandblasted with coarse sand. And then comes the question of etching it.
With what, sandblasting, grinding, or acid?


"M" wrote in message
...
I have a good few lumps of old broken glass some up to about 3" thick and
would like to cut thin sections out but not sure if or how it can be done.
If it can would it be expensive and what percentage woulod be wasted
roughly. Who if anyone does that type of work. What thickness would be the
best to aim for.
It is pieces of a broken lighthouse fresnel lens which we would like in
slivers/sections so that a picture of the lighthouse could be etched onto
them.
Sorry there are som amny questions but hopefully someone may have the
answers.

Thanks Mick