Nonrenewable Resource
A nonrenewable resource is something in The Blockheads which a Blockhead can not reproduce infinitely. The opposite of a nonrenewable resource is a Renewable Resource.
The following resources are not renewable (some can't even be obtained): Air, Magma, Stone, Dirt, Sand, Marble, Red Marble, Limestone, and Lapis Lazuli as well as any item created by these with the exception of Marble White and Ultramarine Blue, which can be obtained by meditating.
A Blockhead can of course make air by destroying any other block. However, there is a finite amount of blocks within each world, therefore air isn't a renewable resource; however, its frequency is extremely high. Stone and dirt are similarly plentiful but finite.
All the other resources are not regularly renewable, however a Blockhead can get most of them by meditating or mining with a gold pickaxe, but of course in a much slower rate than the renewable resources.