nothing, its a volcanic gas that hardens
obsidian obsidian
Obsidian is a type of glassy lava not a gas.
Obsidian and diamond are formed under different conditions and from different materials, so obsidian cannot naturally turn into diamond. Obsidian is a volcanic glass formed from rapidly cooled lava, while diamonds are formed deep within the Earth's mantle under high pressure and temperature.
The cycles are molten rock, lava, and then hardened lava like obsidian.
Lava hardens, and the lava is turned into obsidian, or ignoeus rock.
Lava does not turn directly into a gas. When lava cools and solidifies it can form rocks like basalt or obsidian. However, if the lava contains volatile gases, these can be released as the lava erupts and cools, creating gas emissions.
You have to get a bucket of water. Pour it on the lava and then mine the obsidian with a diamond pickaxe.
Obsidian
As lava cools once exposed to air or water, there may be no time for crystal formation, and it produces an almost glass like substance called obsidian. Obsidian is prized as a gemstone and in jewelry making.
Extruded lava.
obsidian
Obsidian is typically mined through the use of a diamond-tipped pickaxe due to its hardness. Miners can mine obsidian by breaking the blocks with the pickaxe, but it is a slow process because obsidian takes a longer time to break than other minerals. Once mined, obsidian can be crafted into various tools and blocks for use in Minecraft.