Madewell Acetate Hoop Earrings in Shell Tort. Clean pre-owned condition. Color: Shell Tort An update to our favorite hoop earrings fashioned from translucent acetate, now in cool summer party-ready shades. A true statement to set off any look. Diameter: 1 3/4". Gold-plated brass, acetate. Sterling silver posts are naturally soft due to the high silver content (just bend 'em back into shape if they get out of whack). Clean your jewelry after each wearing with a soft cloth.