Gemstone treatment
HPHT Color Treatment
Microscopic signs can be subtle or absent. Some stones show graphitized inclusions, altered strain patterns, or unusual fluorescence/phosphorescence behavior.
01
What to look for
Microscopic signs can be subtle or absent. Some stones show graphitized inclusions, altered strain patterns, or unusual fluorescence/phosphorescence behavior.
02
What it means
High pressure high temperature treatment can remove brown color or create fancy colors in suitable diamonds. Lab testing is often required.
03
Expert move
Do not rely on loupe observation for final separation. Submit high-value colorless, pink, blue, green, or yellow diamonds for laboratory screening.