First Fumed and Dichroic are both referring to the process in making the Glass Hand Pipes.

    Fumed glass are invent by some hard head Around 1990 Bob Snodgrass,  fumed glass was a result of a happily accident  that changed the smoking world forever.  He was blowing glass and one hand, holding silver, got too close to the flame torch.  Voila!  Color changing glass was born and the “Godfather of Glass” leaves a legacy in the forever changed world of glass.

     Why does Fumed glass pipe always change colors ? the short answer, they are not , they do not change colors, the way you see it maybe look different in the light,  those are the colorful effect illusion created by the glass dark resin layers. As a fumed pipe fills with resin the colors pop more against the dark background.  A pipe against a white background will appear yellow whereas it would look blue against a black background. the most common material use to make fumed glass are gold or silvers.