What are the best enchantments for the diamond pickaxe in Minecraft?

Some of the best include:

Efficiency V (Breaks blocks really fast)

Fortune III (Triples the ore drop rates)

Silk Touch I(When you break a block, you will get the block, i.e: When you break Smooth stone you will get smooth stone instead of Cobble)

Unbreaking III (Makes your pick last longer)