Rewardable Ore

In this request or idea, anytime you mine an ore such as coal, iron, copper, diamonds, gold, emeralds, anything ore related, you get a little bit of cobblestone back. It wouldn't be every block but there would be a 75% chance of some cobblestone dropping along with the ore you mined. Same thing would work for the nether too, not as often as it would be in the overworld but the chances would still be there. 

I thought this would be a good addition to the game since its annoying to have to mine a lot more cobblestone along with the ore when I'm trying to build something, this way it saves everyone time in whatever they are doing whether its building or trying to save yourself from a mob.