For deep knowledge’s sake, a sparkling New York Times article on glitter:
What is glitter? The simplest answer is one that will leave you slightly unsatisfied, but at least with your confidence in comprehending basic physical properties intact. Glitter is made from glitter. Big glitter begets smaller glitter; smaller glitter gets everywhere, all glitter is impossible to remove; now never ask this question again.
Ah, but if you, like an impertinent child seeking a logistical timetable of Santa Claus’ nocturnal intercontinental journey, demand a more detailed definition — a word of warning: The path to enlightenment is littered with trade secrets, vapors, aluminum ingots, C.I.A. levels of obfuscation, the invisible regions of the visible spectrum, a unit of measurement expressed as “10-6 m” and also New Jersey.
Humans, even humans who don’t like glitter, like glitter. We are drawn to shiny things in the same wild way our ancestors were overcome by a compulsion to forage for honey. A theory that has found favor among research psychologists (supported, in part, by a study that monitored babies’ enthusiasm for licking plates with glossy finishes) is that our attraction to sparkle is derived from an innate need to seek out fresh water.Caity Weaver of the New york times