Anonymous1157 said:Remember that diamond can show up at up to layer 15, and I remember reading once, somewhere, that it's most common at layer 10 (not sure where I read that, though, since it's not on the minecraftwiki). It's also more likely to appear near large lava flows, although I'm not sure if that holds true even above layer 15. Also, 10 diamonds may just be all that were generated in that chunk, as unlikely as it sounds.
Also, has diamond gotten rarer, or is it just the sheer amount of new ores in Tekkit making it look that way? I have something like a square kilometer of livable space near bedrock, and ten diamonds to show for it. The only other things I've run out of are copper and rubber. (I was surprised to run out of rubber, 'cause two stacks lasted me so long that I just about forgot I ever needed to go tap trees.)