On Earth, a dose or hit of spiral dust comes in a tiny glass tube with a black screw-top cap; it looks very similar in other recursions. Several grains of blue dust (about a quarter of a gram) lie loose in the bottom of each tube. Users take a hit of spiral dust by letting a dose dissolve under the tongue or, for a more intense rush, by dropping the grains directly into their eyes for immediate absorption.
- The Estate believes that spiral dust is made from components gathered in another recursion or in the Strange itself-possibly from cyphers, though that hypothesis hasn't been confirmed.
- People who become addicted to spiral dust are called spiralers. Addicts are easy to spot: their hands tremble with excitement, their speech is exuberant, and, most telling of all, their irises change color, as if stained bluish-purple, and deform slightly as if taking on the shape of a fractal spiral. As a result, addicts usually wear sunglasses.
- Spiralers have incredibly vivid hallucinations while on the drug, and many of them believe that each drug trip is a continuing leg of their spiritual journey.
- Particularly heavy users of spiral dust sometimes disappear. It's hypothesized that such disappearances are either because an addict leaves behind her regular life to join a spiritual messiah in a distant compound, or because she dies of an overdose in an illicit drug den.