Question

The colors in the fine cut diamond are because of which among the following?
[A] Variance in transparency of diamond
[B] Variance in index of refraction
[C] Presence of Impurities
[D] Existence of definite planer layers

Answer 1

Answer:

Presence of Impurities

Notes: Pure diamond should transmit visible light and appear as a clear colorless crystal. Colors in diamond originate from lattice defects and impurities. The diamond crystal lattice is exceptionally strong and only atoms of nitrogen, boron and hydrogen can be introduced into diamond during the growth at significant concentrations (up to atomic percents). Nitrogen gives yellowish color while the Boron gives bluish color.

Answer 2

◆ Complete question is -

Which among the the following does provide colours to fine-cut diamond ?

(1) presence of impurities

(2) variance of transparency of diamond

(3) existence of definite planar layer

(4) variance in refractive index

◆ Answer -

(1) presence of impurities

● Explanation -

Fine-cut diamond is usually transparent. So the colour must be due to some impurities like nitrogen, boron & hydrogen.