https://www.gia.edu/gia-news-research-nr12109
Analysis of HPHT-Treated Diamonds Using Fluorescence Observations
Evaluates a potential method of visually identifying HPHT-treated diamonds using microscopy to observe intense fluorescence at the facet edges and junctions.
treated diamondsanalysishphtusingfluorescence
https://www.gia.edu/gems-gemology/spring-2000-hpht-treated-type-iia-diamonds-fisher0
Spectroscopic Evidence of GE POL HPHT-Treated Natural Type IIA Diamonds | Gems & Gemology
Results from spectroscopic analyses of GE POL high-pressure high-temperature (HPHT) annealed nominally type IIa diamonds are presented, and these spectral...
https://www.gia.edu/gems-gemology/spring-2005-treated-color-diamonds-lucent-wang
Treated-Color Pink-To-Red Diamonds from Lucent Diamonds Inc. | Gems & Gemology
Using a multi-step process, Lucent Diamonds has developed a new treatment process for certain natural diamonds that creates colors from pink-purple through red...
color pinkred diamondstreated