Talk:Ruby/@comment-172.78.124.113-20160121230307/@comment-101.166.240.34-20161011110641

aluminium oxide (henceforth refered to as Corundum) is probs one of the most useful resources in the game. it's commonly used for the chassis upgrade for the seamoth, as well as all of the depth upgrade. wanna go to the lost river? get some corundum. ILZ? Corundum. Complete the main story? you'll need corundum to be able to get into the sea emperor's lair.