The size of the device determines the size of stone that it can cut. - Hobbyist Lapidary Saws: These types of tools are smaller, lightweight lapidary saws usually only used by beginners for small projects like polishing jewelry stones but they also have professional versions as well depending on what you're working with such as cutting slabs of stone or tile in a job site environment. - Professional Lapidary Saw: This type of tool requires a good amount of maintenance, they are heavier and have a slower cutting rate but the reason why you might want one is if your project calls for sawing stones that weigh more than 500 lbs or larger materials like slabs.