Which property is generally the least useful in identifying minerals? color hardness streak cleavage

 Color

Explanation:

A mineral is an inorganic compound that is extracted beneath the earth crust by the process of mining. Minerals can be distinguished from each other on the basis of their physical and chemical properties.

The color is the physical property of the mineral. Two or more minerals can have the same color. Therefore, color will be considered as a least property in identification of minerals.

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