Blue and colorless HPHT lab-grown diamonds often phosphoresce color?

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Multiple Choice

Blue and colorless HPHT lab-grown diamonds often phosphoresce color?

Explanation:
Phosphorescence happens when certain impurity-defect centers in a diamond trap energy under UV light and release it after the light is gone. In HPHT-grown diamonds, especially colorless or blue stones, nickel-related centers formed during the growth can create emissions in the blue-green part of the spectrum. So after you remove the UV source, these centers glow with a green-blue hue. The exact shade can vary with the defect configuration, but green-blue is the typical afterglow for these HPHT diamonds.

Phosphorescence happens when certain impurity-defect centers in a diamond trap energy under UV light and release it after the light is gone. In HPHT-grown diamonds, especially colorless or blue stones, nickel-related centers formed during the growth can create emissions in the blue-green part of the spectrum. So after you remove the UV source, these centers glow with a green-blue hue. The exact shade can vary with the defect configuration, but green-blue is the typical afterglow for these HPHT diamonds.

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