I am so sorry that you lost your diamond tools and your armor. I'm amazed you stayed so calm. I've lost my tools and experience points when I was mining too quickly and incautiously and fell into a block of lava. My reaction cannot be quoted here, but be certain that it involved expletives and a few screams. I am enjoying watching you become more savvy as you progress through the videos. Your videos inspired me to play Minecraft, and I am appreciative.
Fortune on pickaxes increases the amount of ore you get when mining downs affect iron and gold tho only coal lapis redstone diamond emerald and quarts but is amazing on diamonds (don't my use on stone it's a waste of such a good enchant)