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Long UV and Yellow sapphire

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Does a yellow Sapphire improves its colour with exposure to Long UV light ?Why ? Could it be detected by lab ? Is the effect permanent ? do other Sapphires respond to any other light in this way ?

asked Jan 9, 2013 by satishtakle (120 points)

1 Answer

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Sapphire is to my knowledge very stable, and I am not aware of any color changes to UV exposure. Do you have any evidence to support a possibility of color change in UV light exposure?

answered Jan 11, 2013 by hershel (49,750 points)

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