When sourcing diamond saw blades, you must prioritize the diamond concentration and grit size, as these directly impact cutting speed and finish quality. For hard stones like granite, a higher diamond concentration is required, whereas softer stones like marble benefit from a medium concentration to prevent glazing. Ensure the segment height is at least 10mm to 15mm for a longer service life, and verify that the core material is made of high-quality 65Mn spring steel to prevent warping under high temperatures.