Well done! You grinded enough exp for a fortune III, hopefully you also got an unbreakable on top of it, but beggers cant be choosers
This now means that you have:
20% chance of recieving 2 diamonds per diamond ore
20% chance of recieving 3 diamonds per diamond ore
20% chance of recieving 4 diamonds per diamond ore
Ultimately resulting in an equal or greater than 60% chance of recieving more than two diamonds per diamond ore.
Edit: Very confused as to the movement of this post.