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Which mineral gives streak?

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in Engineering Geology by (962k points)
Which mineral gives streak?

(a) Coloured and translucent

(b) Colourless and opaque

(c) Coloured and opaque

(d) Coloured and transparent

This question was addressed to me during an online interview.

The query is from Physical Properties topic in section The Study of Minerals of Engineering Geology

1 Answer

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Correct choice is (c) Coloured and opaque

To elaborate: Colourless and transparent minerals will always give a colourless streak that has no significance. The coloured and opaque minerals, especially of ore groups, give typically characteristic streaks quite different from other similarly looking minerals.

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