Hued afterglow: fingerprinting diamonds via phosphorescence.(This Week)

Science News | January 12, 2008| | Copyright

The eerie phosphorescence displayed by a rare form of blue diamond can be used as an easy, cheap, and nondestructive way to identify individual gemstones and to distinguish natural blue diamonds from synthetic ones, analyses suggest.

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Phosphorescence, a "glow-in-the-dark" process in which energy previously absorbed by a substance is released slowly in the form of light, is common in a certain type of blue diamond. After exposure to light, these type lib diamonds, which have boron- and nitrogen-containing impurities, softly glow in ...

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