The specific steps of cutting kohlrabi into diamond-shaped blocks are as follows:

1. Put kohlrabi on the chopping board with the bottom root facing up.

2. Cut off the root at the bottom of kohlrabi with a knife.

3. Cut the kohlrabi in half, cut off the roots and then cut the kohlrabi in half.

4. Cut kohlrabi into wide strips.

5. Rotate the kohlrabi and cut it into diamond-shaped pieces diagonally with a knife.

The kohlrabi cut in this way is a diamond-shaped block.