Tutorials/Diamonds

This explains how to find Diamonds in Minecraft.

Your First Diamond
Steps - 1 Dig down to layer 12-16(See Altitude. ) - 2 Start mining straight ahead(Not down) - 3 Start making 'Ramdom digs' into the walls (Video Here.) - 4 If you see diamonds while ramdom digging,Mine it and mine around a little to look for hidden. - 5 Repeat.

Be sure to look out for lava and other hazards, as they are common at this layer. It is not good if you have, say, a stack of coal, a stack of iron, full iron armor, some redstone, maybe lapis or gold, and a few diamonds, then die to a few skeletons and spiders or some lava.

Another way of finding diamonds is by downloading a texture pack which allows you to see through stone blocks and then go around layer 12. (This is useful but I personally class it as cheating).