because they like TOAST
Mineral extraction sites adjacent to the railroad line.
A mineral that is useful and economically viable to extract and purify is an ore.
because its small
Luster is typically considered the least useful mineral property, as it does not provide much information about the mineral's identity or composition. Luster simply describes how light is reflected off the surface of a mineral, such as metallic, glassy, or dull, and can vary even within the same mineral species.
coal
Color and streak would be the least useful, because they may be shared by a multitude of other minerals.
penis
maybe copper
smelting
Flotation is a process of separation of an useful mineral from gangue.
no, because the same mineral can be more than one color.
zinc is an essential mineral that keeps you healthy...I'd say that's pretty useful.