As a side note, this is an older piece.  Today, most of these pastel colored tourmalines are irradiated to increase their color saturation, but at the time when this was found, such treatments were unheard of.  Irradiation of tourmaline specimens is a MAJOR problem with Afghan specimens, and it extends to many of the top dollar pieces on the market these days as well.  For decades, these same pegmatites produced crystals within a certain range of color saturation-- all of a sudden about 10 years ago there was an influx of more saturated examples that coincideded with the appearance of treated spodumene and topazes.  I very much doubt it is a coincidence...