Digging through a random large vein of coal the other day, found 5 diamond vein at level 7.
Apparently YouTube videos don't embed if you use the https link.
---------- Post added at 04:14 PM ---------- Previous post was at 01:02 PM ----------
Interesting bug: I joined the server, put a couple items in a chest, shortly after fell to my death (missed the water in a Leeuwenhoek drop), and when I went to pick up my items, I found everything including the items that were supposed to be in the chest. Could be that they were never put into the chest, I was lagging using the chest. But, interesting...