Gravel Versions of Ores + New Mechanic With it

There should be gravel variants of existing ores, like from the Tinker's Construct mod. 1st, they'd just be another great set of blocks to blend with existing ores, but I have a really cool mechanic for them. 1st they should just spawn where the stone versions of the ores usually would, but they should also a lot of times cover its stone variant ore veins. They can only be collected with the correct material of the shovel like the pickaxe, & they get destroyed if it falls on torches (where gravel becomes a dropped item), or just drop normal gravel. This way you need an extra good tool & you have to be extra careful not to place torches or other non-full blocks under them to get the extra resource, & if you do it right, you get a ton of that extra resource! That'd be a cool little mechanic.