Dust motes swam alongside her down the gloomy corridor.
The flakes were not large, but unlike most gentle Ouray snow storms, they didn't drift to the ground like tiny dust motes.
The extremely small particles of dust (motes in a sunbeam) in the rays are made perceptible by the diffracted light, whilst by ordinary illumination they are invisible.
It is like molten glass cooled but not congealed, and the few motes in it are pure and beautiful like the imperfections in glass.