Gemstone treatment
Irradiation, Tourmaline
Color may become stronger or shift toward pink/red in some material. Microscopic signs are usually absent.
01
What to look for
Color may become stronger or shift toward pink/red in some material. Microscopic signs are usually absent.
02
What it means
Irradiation can alter tourmaline color centers. It may be used alone or followed by heating.
03
Expert move
Assume fine color tourmaline may require disclosure support when value is high. Laboratory testing can be necessary.