Wood is b far the most useful item int eh game, as you can't do anything without it, practically, but without coal and iron, you'd not be able to get anything. Diamonds, redstone and lapis are jus nice to have, lapis looks cool, red stones fun to play around with and diamonds get yo t the nether, other then that, you may as well not have them in the game, diamonds may also have more uses and damage, though.