These were great initially, but the earrings turned black after a week of wear. They were so black they looked burnt/charred. The sales person I spoke to suggested that it was due to the acidity of my skin, but I had sterling silver earrings in my two other lobe piercings at the same and they're fine. I've never had my sterling silver jewelry do this. This is the third pair of ball studs from Michael Hill I've had to return.