I started a new world today, in fact I made a thread about it, because it had some very striking features. I now have found that possibly the most intriguing feature is that it appears to be... diamondless. I have found a cave system that threads through the lower 20 floors of the world. I have searched for hours, and even excavated a few artificial caverns in search of diamonds. I checked my coordinates, which showed I was always between 16 and 10 (the most common floors for diamonds). I do not know if I'm doing something wrong, but it it possible to actually have a diamondless world?