Please read the profile before considering a purchase. m(_ _)m These are platinum 900 ruby earrings... I don't have any documentation to prove it, and there are markings and what appears to be the manufacturer's mark, but they're not clear in the photos. Therefore, please refrain from purchasing if you have any concerns. I received them as a gift and wore them a few times, but I don't wear earrings much anymore, so I'm selling them as part of a decluttering effort. Originally, they came with special platinum and silicone round backings, but I've lost them and have been using regular silicone backings. I will include those. The ribbon shape is not flimsy; it has a solid thickness. Therefore, the ribbon shape is unlikely to deform when attaching. I don't have a scale to measure the weight, so I apologize, but I don't know the weight. Please understand the description fully and only purchase if you are satisfied.