Diamond powder and dust (710510) consists of finely comminuted material used as an abrasive medium, whereas worked industrial diamonds (710229 under heading 7102) are discrete stones that have been shaped or processed but retain their individual form. If the material is a loose powder or slurry of diamond particles, heading 7105 applies; if it is a shaped diamond tool insert or individual worked stone, heading 7102 is more appropriate.

Diamond powder and abrasive stone powders are critical inputs for semiconductor wafer lapping, precision optics polishing, cutting-tool manufacturing, and advanced ceramics processing. The semiconductor and hard-disk industries in particular depend on consistent particle-size specifications, making grade certification from the supplier an important part of the import documentation package.