Full circle moment. This cartilage stud earring features a ring of CZ stones set in 14K hollow gold with a titanium flat-back post for 24/7 sparkle and a smooth, snag-free fit. Made in responsibly sourced 14K hollow gold and hypoallergenic polished titanium that's both lightweight and durable. Stone Type: Cubic Zirconia Stone Size: 1.4mm Gauge: 18G Tube Length: 5/16" Fits cartilage piercings: helix, forward helix, tragus, conch and flat.