I have found lava right next to water, but when they touch it just makes cobblestone - I'm trying to get obsidian.

  • Water has to flow onto stationary lava (source block).
    – Batophobia
    Commented Jul 11, 2013 at 1:37
  • Is this not exactly gaming.stackexchange.com/questions/123315/…?
    – Frank
    Commented Jul 11, 2013 at 3:42
  • @fbueckert It's not quite the same. That seems to ask for where one can FIND it while this one asks how one MAKES it.
    – Batophobia
    Commented Jul 11, 2013 at 14:31

2 Answers 2


Right, the answer is water flow on a lava source. Water/lava interactions work like this:

Water flow + lava source = Obsidian
Lava flow + water source = Stone
Water flow + lava flow = Cobblestone


You dump water on a lava block - an easy way is to put the lava in a 1 block pit, and flood it with water from the surrounding area. This will destroy the lava and leave an obsidian block behind. Considering that obsidian is hard to mine, its better to use a bucket to take the lava, move it where you need to, and then water it.

  • 2
    Also note that only lava Source blocks can turn into obsidian, the 'flow' blocks turn into cobblestone
    – user48195
    Commented Jul 11, 2013 at 9:57
  • But when I did it it was lava flow to water source
    – user52423
    Commented Jul 23, 2013 at 12:59

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