Look at the hardness
Scrape each other with the edges and corners of tile fragments to see whether the broken fragments are fine or loose, brittle or soft, leaving scratches or loose powder. If the former is top grade, the latter is poor quality.
grind
Household goods and furniture are placed on tiles, and the surface of tiles bears the greatest friction. When dragging tables and chairs, children play with toys and metal objects fall to the ground, which is easy to scratch the surface of ceramic tiles. The national patent technology of "Super Wear-resistant Diamond Glaze" was originally created by Bighorn Deer, and its wear resistance reached above Grade 4, which was three times higher than that of ordinary tiles, effectively improving the wear resistance of marble tiles.
Look at the pattern
Good ceramic tile patterns and patterns are clear and consistent in color, exquisite in workmanship, without obvious color leakage, dislocation, broken line or inconsistent in depth.