Mineral a is purple. mineral b is black. both minerals leave the same color streak. which of the following statements is true?

-both minerals have the same true color.
-both minerals have identical physical properties.
-mineral a is made from different elements than mineral b.
-mineral b is a gem, but mineral a is a common mineral.

Mineral A is made from different elements than Mineral B.

Explanation:

A mineral is an inorganic substance obtain from below the earth crust in the geospheres. They are obtain from the rocks by mining process. These minerals can be identified by their physical and chemical properties. The physical properties include color of the mineral. The color of the mineral can be observed externally but two or more minerals may have the same color externally. But by using the streak method the mineral is rubbed over a surface. The color of the powder obtained after this process is the exact color of the mineral which can be used to distinguish between two minerals. It defines the elemental composition of the mineral.

The correct answer is "Both minerals have the same true color".

Explanation:

A mineral color streak refers to the color the mineral displays when is in a finely powdered form. Even though the color streak could be completely different from the one the mineral displays when is as a hand specimen, it is considered that the true color of the mineral is the color streak. Therefore, maybe mineral A and mineral B are purple and black when they are as hand specimen, respectively. But if both minerals leave the same color streak, both minerals have the same true color.

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