I looked at a knife edge I made with their "1 micron" paste and that made with "1 micron" used lapping film. The film was used to polish fiber optics, but it looked to be in pretty decent condition.

There were *fewer* visible scratch lines on the paste.

Another heads-up, would be that some diamond pastes are made from synthetic diamonds...
Synthetic diamonds are real diamonds just as man made snow is real snow.