Enhancements
Colorless tourmaline is not enhanced.
More information on gemstone enhancements.
Achroite (Colorless Tourmaline) ...
We also found several specimens covered with little crystals of tricolored tourmaline and even colorless tourmaline (achroite). It is, however, illusory to imagine gathering beautiful crystals if one has only a geologist’s hammer.
Chrome tourmaline -- vivid green. Derives its color from chromium. Appears red when viewed through a Chelsea filter (emerald filter). Fairly scarce and expensive.
Achroite -- colorless tourmaline. Fairly rare.
 See also: Tourmaline, Colorless, Color, Stone, Emerald
  
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