diamond in the end what is the thing ah really have diamonds on it that can not be ah

Hello, diamond drill is curium porcelain, curium pots, curium stone glasses when drilling with the tool, there are diamonds on it, there are also used in carbide steel, but with much worse than diamonds, look at the picture below

The first two steel wire in the middle of the set of white is a natural diamond, the following is diamond. This is the traditional bow diamond.