gold, consisting of two equilateral triangles pointing up and down and overlapping, with the raised Greek letters on a center band. Above the letters was a retort and below an emerald. The pin was surrounded by 22 pearls, eleven above and eleven below. The pledge pin is a small silver retort with the letters on the bowl. The crest consists of a knight bearing upon his shoulder the balanced scale of justice and on his arm a shield upon which is a retort, a helix, a crucible, a scalpel and an open book. Underneath is a scroll bearing the words Pi Delta Nu in Greek script. Its colors are "gentian violet" and gold. ("Gentian violet" was noteworthy as the name of a dye that was once used in certain antibacterial and classification procedures.) The sorority's flower was the violet. The Fraternity's magazine was The Retort. See also Professional fraternities and sororities References Defunct fraternities and sororities Student organizations established in 1921 1921 establishments in Missouri