Flotation is a process of separation of an useful mineral from gangue.
ore
It is called smelting
Smelting
The process of extracting a useful substance from an ore typically involves crushing the ore to release the desired mineral, then separating the mineral from the gangue (unwanted material) using physical or chemical methods such as gravity separation, flotation, or leaching. Finally, the extracted mineral is further refined to obtain the desired substance in its pure form.
smelting
The color of a mineral in its powdered form is called streak. This can be determined by rubbing the mineral against a porcelain streak plate, which helps reveal the true color of the mineral's powder. The streak color can sometimes differ from the apparent color of the mineral, making it a useful property for identification.
A mineral's streak is found by rubbing the mineral against a porcelain streak plate, which is unglazed and usually white. This process leaves a powdered form of the mineral on the plate, revealing the true color of the mineral in its powdered state. The streak can be useful for identification, as it often differs from the mineral's external color.
This is a raw material (feedstock).
Mineral extraction sites adjacent to the railroad line.
A mineral that is useful and economically viable to extract and purify is an ore.
The color left behind when a mineral is rubbed against a rough surface is called its streak. This property can help identify the mineral, as the streak color may differ from the mineral's external color. Streak is determined by rubbing the mineral on a porcelain plate or similar surface, and it is a useful characteristic in mineral identification.