Because sometimes more than one mineral have the same colour.
A mineral's color may be influenced by inclusions of other elements or minerals, or even exposure to heat, light, and radiation. A more reliable identification based on color would be the streak, or color of the powdered mineral.
hardness
you might make an incorrect identification
how might you decide whether a given substance is a mineral
how might you decide whether a given substance is a mineral
how might you decide whether a given substance is a mineral
sniffing butts.XD
sniffing butts.XD
In some cases it will cost more to mine and refine the mineral than that mineral is worth. This can occur if the concentration of the mineral is too low, or if it is buried too deep to be accessed cost-effectively. In this case, the mineral resource is techincally not an ore, as by definition, an ore is a mineral resource that can be extracted at a profit.
Color is probably one of the least reliable properties used in mineral identification. There are many minerals which have the same color, and many minerals have more than one color. For example, hornblende, axi...
Many men find pink to be too feminine. It is a difficult color to match and easily stained.
lead