This is a model of the classical Minecraft diamond pickaxe.

Although the AMS version does take longer, it looks way better in my opinion, so if you have the opportunity, I suggest the colored version.

Also, if you like this model, please check out my Minecraft tools collection. 

For now, there is only an axe, a diamond pickaxe, and a diamond sword in there, but I'm planing add more in the future.

Here is a few size comparism pictures for the pickaxe.