On 11 Jan, 02:09, " wrote:

Is it possible to cut glass blocks accurately and cleanly?

Yes. Either water jet (easy, costs a little) or else a wet wheel tile
cutter, and you'll lose a few.

Don't be surprised if some of them spontaneously crack a few days
after cutting.

On the whole I'd avoid this. You need to seal the insides of glass
blocks very carefully around bathrooms, otherwise you get condensation
problems. Pragmatically I'd probably redesign until I could use full &
half blocks, without cutting.