I have unbanned you, sorry you were banned in the first place. We usually look for erratic mining patterns when we're trying to decide if someone is an x-rayer, sometimes it can be difficult to tell if their mining style is what it is because they're an x-rayer or because that's just how they mine. The percentages that enigma posted tell us the percentage of a particular ore mined compared to the total amount of stuff you've mined, so you'd expect the diamond percentage to be quite low. Usually it will sit around 1%, so we'll usually investigate if we find it's much higher than this, as in your case.