The element you are referring to is iodine. In its solid form, iodine appears as a hard, black, shiny material. When heated, it sublimes directly from a solid to a gas, turning into a brownish-purple vapor. As the vapor cools, it forms brownish powder deposits.
In solid form it is black, but it is usually a powder and that is brown.
When copper powder is heated, it undergoes a series of color changes as it oxidizes. Initially, it turns black as copper oxide forms on the surface, then it changes to a red-brown color as cupric oxide forms. Finally, at higher temperatures, it transforms into a black solid known as cupric oxide.
Boron is typically found in an amorphous brown or black powder form. It does not have a distinct color in its natural state.
The color of powder can vary depending on what it is made of. It can be any color, such as white, black, brown, green, etc.
Copper oxide appears as a black or dark brown powder after copper has burned.
dark brown or black
dark brown or black
dark brown or black
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.
dark brown or black rocks
dark brown or black rocks