In the final stanza of the poem “It Sifts from Leaden Sieves,” the imagery and connotations suggest a sense of refinement and ethereal quality. The phrases "ruffles wrists of posts" and "as ankles of a queen" convey a delicate and gentle touch, while "stills its artisans like ghosts" implies a quiet and unobtrusive presence.
Based on this analysis, the adjective that might best describe the snow is delicate.