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Diamond Fluorescence

Fluorescence in Diamonds, some people like the effect while others do not, in usual circumstances it is never seen unless the diamond displays a very high fluorescence, though if a diamond that displays usual fluorescence is exposed to direct or intense ultraviolet light a bluish glow can be observed. Strong fluorescence can lower the price of a Diamond, but in some case may even lift the color one grade to the naked eye so to add to the beauty, or even detract from the diamond giving it a slightly hazy appearance. It's one factor that should be check with the individual opinion depending on the amount of fluorescence displayed.

Diamonds displaying different levels of fluorescence under ultraviolet light

Listed below are the abbreviations for describing strength of fluorescence that should be noted when reading a diamond grading report:

Strong Fluorescence
  • N, NO, NON, - No Fluorescence
  • F, FB, FT, FA, - Faint or Faint Blue Fluorescence
  • SL, SLB, SLT, - Slight Fluorescence
  • M, MO, ME, MD - Medium or Moderate Fluorescence
  • S, ST, STB, STG, - Strong Fluorescence
  • E, EX, EXB, EF, - Extreme Fluorescence