Why can't I mine ore veins again even though it looks like they've respawned?

Solution 1:

The coloration returning does not always indicate that it has fully replenished. It will return in due time. If you have already waited a month, it shouldn't be too much longer.

Solution 2:

If an ore vein looks like it has ore to mine, but you cannot interact with it, you can leave the area and immediately re-enter it again, the veins will become minable.

Solution 3:

I had the exact issue on my PS3, I just quit the game and went back on and I can mine it all now :) try quiting and re-opening the game, or restarting your console.

Solution 4:

When I had this problem on xbox, I would just leave the mine or cave and then go right back in.