What's the name of the tool with which we can cut glass? We can cut like a circle, or any other shape, from the middle. It's like a pencil. In Farsi, we literally call it a 'diamond', since, I think, there's a veneer of diamond on the part working on the glass.
A generic marking tool that scratches rather than leaving behind some marking material is called a scribe. The term is also a verb describing the process.
Emmett
I forgot to include a word in my question- out. "With which we cut out glass". It's not a marking tool.
I'm boring. I always call it a glass cutter.