Basalt is a very common stone in the crystal complexus elementalis. Basalt has average conductive proprieties of a stone; its thermal conductivity is somewhat low. Unlike most stones, it can melt into magma or lava. It is called magma when underground, and lava when exposed to the atmosphere.
Basalt has a weak smell and is not radioactive. It is not generally reactive, although it binds or assembles with salts, metals and stones spontaneously or when flooded with water, creating impure rocks.
It is very strong and won't shatter with weak blows. In nature, it is porous and filled with gas bubbles, but remains sturdy. It is not much hard and can be scratched with some strength. It is very dense and will sink in any humour.
Basalt is native to lower layers of the Milky Firmament, due to its density. It is often expelled in the form of lava by volcanoes, however, being found on the surface near them.