1. Waterjet cutting is simply an accelerated manufacturing erosion process within a selected material. Highly pressurised water is fired through a ruby or diamond nozzle into a mixing chamber. This pressure creates a vacuum and draws garnet sand into the stream where it is then fired at the object in place for cutting. The sand particles eat away at the material causing the effect of erosion to take place at such a high speed it is deemed as cutting. (https://www.techniwaterjet.com/how-it-works/). 2. A water jet cutter, also known as a water jet or waterjet, is an industrial tool capable of cutting a wide variety of materials using an extremely high-pressure jet of water, or a mixture of water and an abrasive substance. (Wikipedia). 3. Waterjet cutting is a mechanical process where the material is removed by physical contact and material wear. The main difference with other cutting processes is the fact that it’s a cold-cutting process (non-thermal), meaning that no heat is used in the cutting process. (https://fractory.com/waterjet-cutting-explained/)