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Explain the reason for glittering of dia...

Explain the reason for glittering of diamond

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Diamond appears dazzing because the internal refleecton of light happens inside the diamond. The refractive index of only diamond is about 2.417. It is much larger than that for ordianry glass which is about only 1.5 The cirtical angle of diamond is about `24.4^(@)`. It is much less than that of glass. A skilled diamond cutter makes use of this larger range of angle of incidence `(24.4^(@) to 90^(@) "inside the diamond")`. to ensure that light entering the diamond is total internally reflected form the many cut face before getting out. This gives a sparking effect for diamond.
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