Water jets can cut glass just not tempered glass. As with cutting tiles there are measures that need to be taken to ensure the integrity of the glass being cut. When glass cutting, the glass must be placed on a solid surface to ensure even support under the material. Also, the water jet needs to be set at a lower pressure to pierce and cut the brittle material. The lead in, in the cut file, needs to be made longer than cutting many other common materials, such as: metals, plastics, rubbers, etc. All of these tricks help to eliminate stress to the material and avoid unwanted chipping.
“Practice yourself, in little things, and then proceed to greater.”