Obsidian is the material found under all other stone. It is a dark purple or black block. Obsidian cannot be broken with anything other than a diamond pickaxe. Obsidian can be crafted by three stone blocks on each row. Obsidian is very useful because hostile mobs can't break it. Also, if you are building an arena, obsidian is a good choice.
Pages in category "Obsidian:"
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