DIFFERENT GRADES OF DIAMOND BLADES....
Industrial grade diamond is very expensive. The performance of a diamond blade depends mostly on the quality and total amount of diamond used in the manufacturing. By adding more or better quality diamond the user will generally obtain a lower cutting cost. A blade that costs 15% more will often give 50% more life at a faster cutting speed. For smaller jobs or occasional use a lower priced blade may be suitable. For larger jobs or frequent use the higher priced blade will actually be less expensive to use, when measuring the cost per cut.