Information on black light/florescence

Perhaps, this Gem-A webpage on using black light and fluorescence might be of interest. "The Gemmological Association of Great Britain, or Gem-A, is the world’s longest established provider of gem and jewellery education." I found the information about having the gemstone "table down" particularly helpful.


1. "https://gem-a.com/gem-hub/gem-knowledge/focus-on-fluorescence"