Photographed by Stephen Mark Sullivan

A CLEAR WINNER: perfect middle ground. The translucence of crystal illuminates a wearer’s face, allowing a thick frame style that doesn’t overwhelm. Its fans tout it as an unusual classic, a seasonless frame that complements every wardrobe but still offers a stylistic twist. Amp up the size or outline it in a color like red, and crystal becomes funky; pair it with black to create a fade that men will appreciate, or give it a hint of color to flatter any skin tone.

—Iris Johnson