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The type of mineral which shows a set of colours in succession is?

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The type of mineral which shows a set of colours in succession is?

(a) Idiochromatic

(b) Pseudochromatic

(c) Allochromatic

(d) Iridescence

I got this question in unit test.

This key question is from Physical Properties in portion The Study of Minerals of Engineering Geology

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Right choice is (b) Pseudochromatic

To elaborate: Pseudochromatic minerals show false colour. Such an effect generally happens when a mineral is rotated in hand; it is then seen to show a set colours in succession.

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