Diamonds
Diamond Engagement Rings
Home
Diamonds
Precious Stones
Precious Stones
Uses
Sitemap

Monday, August 3, 2009

Effective instantly, the Gemological Institute of America (GIA) will include a description of a diamond's ultraviolet fluorescence in its GIA Diamond Grading Reports and Diamond Dossiers. The Institute will use in their recently revised diamond grading reports to help better educate the public on this "common, but little understood phenomenon in diamonds," the Institute said in a latest press release.

A separate, four-color insert chart will explain the properties of a diamond's fluorescence in consumer-friendly terms and includes comparison images of diamonds in both natural and UV light to demonstrate varying intensities of fluorescence. The five terms GIA uses to categorize the intensity of the fluorescence are: None, Faint, Medium, Strong, and Very Strong.

"Some diamonds show fluorescence and some don't," said Thomas Moses, GIA's senior vice president of Laboratory and Research. "Fluorescence is the emission of visible light by a diamond when it is inspired by invisible ultraviolet (UV) rays. It is a general characteristic of diamonds. The diamond simply glows under the UV lights, generally a blue color, which most often stops when the energy source causing it is removed."
For more than 50 years, GIA has indicated the presence of diamond fluorescence on its diamond grading reports, however described it on the report as an "identification characteristic only - not a grade," Moses said.

"This insert will help the public better understand diamonds in common, which gives them more self-confidence and knowledge when making a decision about a diamond," Moses added.

GIA has additional information on fluorescence on its website, including a scientific article, "A Contribution to Understanding Blue Fluorescence on the Appearance of Diamonds," by Thomas M. Moses, Ilene M. Reinitz, Mary L. Johnson, John M. King and James E. Shigley, which appeared in the Winter 1997 issue of GIA’s Gems & Gemology.

For more information visit : http://www.jckonline.com/article/CA6669405.html?industryid=704

Labels:

posted by Tamil Nadu ,Tamilnadu Government,Places,Wild Life,Hill Stations,Temples,Sports,Accomodation,Cusine,Fine Art @ 10:37 PM permanent link | Post a Comment | 0 comments

Previous Posts
  • Extraterrestrial formation
  • Thermal stability of Diamonds
  • Synthetic and Artificial Gemstones
  • Heat treatment to Gemstones
  • Industrial uses of Diamond
  • Diamond Clarity
  • Diamond formation
  • Color Factors
  • Diamond enhancements
  • Diamond Identification


  • Archives
  • May 2008
  • June 2008
  • July 2008
  • August 2008
  • September 2008
  • October 2008
  • November 2008
  • December 2008
  • January 2009
  • February 2009
  • March 2009
  • April 2009
  • May 2009
  • June 2009
  • July 2009
  • August 2009
  • September 2009
  • October 2009
  • November 2009
  • December 2009
  • January 2010
  • February 2010
  • March 2010
  •  

    blog counter