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Lustre doesn’t depend on?

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Lustre doesn’t depend on?

(a) Refractive index mineral

(b) Absorption of mineral

(c) Transmittance of mineral

(d) Nature of reflecting surface

The question was asked during an online interview.

This intriguing question originated from Physical Properties in portion The Study of Minerals of Engineering Geology

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Right choice is (c) Transmittance of mineral

For explanation I would say: Lustre depends on: refractive index of the mineral, absorption capacity of the mineral and nature of reflecting surface.

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