Want this question answered?
Boron
In solid form it is black, but it is usually a powder and that is brown.
Boron is a brown powder, though crystalline boron is black.
dark brown or black
Copper oxide appears as a black or dark brown powder after copper has burned.
Dark brown or black topsoils get there color from organic material that decomposes - leaves, animal feces, etc. Desert soils have little organic material.
dark brown or black
dark brown or black
dark brown or black rocks
dark brown or black rocks
It can be turned into a gas, but it is a black rock in natural forn. It could also become a brown powder used for gunpowder.
Heroin is dark brown-light brown, black tar is powder that turns sticky and tar like when warm. It smells like vinegar and is very bitter to the tongue.