Valuable liquid

I think it would be cool if they added a liquid (maybe underground in the savana since that biome is kinda boring currently) in pockets, generating like lava. You could pick up this liquid in a bucket. When you place it down, you can pour lava on top and it would turn into netherrite or something strong like netherrite (the same way lava and water make cobblestone). It would be a cool new way to store valuables, as you could have a waterfall or fountain as well.