(602) 955-1535
 
 
   

Diamond Education - Fluorescence

Back to Diamond Education

Fluorescence is a form of light that is produced when ultra violet light enters a diamond. Most diamonds contain some degree of fluorescence, which ranges from very slight to very strong. Some diamonds contain little or no fluorescence which raises their value.

Sunlight and most forms of indoor light contain small amounts of UV light. However, in most cases, the fluorescent light emitted does not effect a diamond's appearance. Fluorescence is most evident when a diamond placed under a UV lamp in a dark room. Under these conditions, a diamond will appear to have a blue glow. Some diamonds will appear to have a yellow or even a green glow. We suggest avoiding diamonds with a green or yellow tint.

Fluorescence has little or no effect on the appearance of most diamonds, and in diamonds with a color rating of J or lower, it may even enhance appearance. The blue glow of the fluorescent light and the yellow tint of the diamond tend to cancel each other out. However, diamonds in the colorless to near colorless range (D to F) may be affected by fluorescence. These diamonds may appear milky or oily due to their fluorescence. When purchasing a colorless diamond, we recommend selecting one with little or no fluorescence.

Remember, when determining an acceptable level of fluorescence, be sure to base your choice on the diamond's color. A commonly accepted rule of thumb tells us that:

  • The higher (colorless) grades, D through F, will be adversely effected by flourescence.
    They will appear milky or oily.
  • The middle grades, G through I, appear to have some tolerance for fluorescence. Mild to moderate amounts of fluorescence can be acceptable. However it is advisable to shy away from strong fluorescence with these color grades. Personal taste in the appearance of your diamond is suggested here.
  • The lower grades, J through M, can actually have their appearance improved by fluorescence. The blue of the fluorescent light, and the yellow tint from the diamond will have a tendency to cancel each other out, allowing the diamond to look whiter.

 
 
  Home | Contact | Education | About Us | Diamond Buyers Guide| Privacy Policy

Services: Jewelry & Diamond Appraisals | Jewelry & Watch Repair | Custom Design Services

Sales: Loose Diamonds | Jewelry | Pre-owned Rolex | Estate Jewelry

© Copyright 2002-2010 Diamond Showcase, All Rights Reserved

This is an information only website. Diamond Showcase does not collect, retrive, store or otherwise maintain any personal data from visitors to this site.