Minecraft won't let me mine?

OK so I started to dig and mine but for some reason I can't mine anything. I found gold diamonds and iron but when I mine it all it does is disappear leaving behind nothing. Need help

Why the hell is this under the category of Family & Relationships > Weddings?

You need a better pickaxe.

By the way, wrong section.

It just put it in this category I never set it on wedding or whatever