Why can't I find any diamonds? [closed]

I am having some trouble locating diamonds; I can find anything but diamonds. I'm not a new player, I understand the how and where to find diamonds, and I've never had trouble before. I've managed to find 2 in chests, but I don't think they are spawning underground.

Is Minecraft broken (preventing natural deposits of diamond from spawning)? Is something wrong with my version of Minecraft specifically? Does it have something to do with my installed mods? Or am I just having an unlucky run?

I'm running Minecraft v1.7.10, with Forge and Thaumcraft installed.

Solution 1:

According to Minecraft Wiki, there is an average of 3.097 diamond ore per chunk-sized area. I think you are just being unlucky.