This cartilage stud is all about the glow. A simulated opal center shifts in the light, framed by a ring of CZs to illuminate your stack. Made in 14K hollow gold and titanium for comfortable, everyday wear. Made in responsibly sourced 14K hollow yellow gold and hypoallergenic polished titanium for everyday wear. Stone: Simulated Opal, Cubic Zirconia Stone Size:1.25 mm Gauge: 18G Tube Length: 5/16" Height x Width: 5.5 x5.45 m m Fits cartilage piercings: helix, forward helix, tragus, conch and flat.