From Mejuri: A statement stud made for showing off. Handcrafted in 14k solid gold and set with three marquise cut ethically sourced and conflict-free diamonds. Threadless flat back studs allow for maximum comfort and help to facilitate the healing process. The backing post is crafted using implant grade titanium that is safe for all metal sensitivities. I will clean this earring using an ultrasonic jeweler cleaner before shipping :)