How do I detect with which pickaxe the player is breaking the block?

I am creating a great mod I would say but, I created a ore that gives you a random mineral, this block can only be broken by the iron peak onwards, I did a procedure to make when you break the block you get a random mineral, and I put it into action when the player breaks the block, here goes the problem, if the player breaks it with a stone or wood pickaxe even then gives him the minerals, then I want to know if it can be detected with which pickaxe the player broke the block