First, I'm going to move this to the right place.
Okay, your first mining trip to the hollows:
You started mining randomly somewhere in the hollows, came upon a lavalake, turned right, then, all of a sudden left again, went up one block, found emeralds, went five blocks straight, dug a stair down, more emeralds, straight again, diamonds, up, lavalake, removed stone, diamonds, randomly left, more diamonds.
Your second mining trip to the SW:
You finds diamonds (he hit them right up), then went left, dug a stone away above your head, where was iron, and behind that, diamonds.
Go on, hit gravel, moves one block to the left, starts making your tunnel 3 blocks high and find, guess what, diamonds.
Next, SW again.
You go into a random tunnel, dig a bit of stone away, diamonds, walks some more through a random tunnel, remove some stone above your head, emerald, two blocks further, remove some stone in the side wall/above your head, diamonds, makes a somewhat zigzaggy road, removes some stone above his head, monster spawner.
Note, I was stalking you with this one, you really do look conspicious when mining.
And your last mining trip:
Walking through random tunnels, removing stone, finding iron and above that diamond, where somebody has already dug a tunnel/cleared an area. Also some more random tunnelling/removing stone and finding ores behind that.
If this is not enough explaination, I can copy screenshots for you.
Also:
34 diamonds in 2 minutes
19 diamonds in 4 minutes
19 diamonds in 6 minutes
24 diamonds in 8 minutes
Please don't blame this on your fortune pickaxe, these aren't the actual diamonds you found, but the amount of ores you broke.