The earrings are very beautiful and of good quality, the problem is the closure. I bought these earrings precisely because of the type of closure, thinking they would be safer, but with a simple gentle touch of my nail, they twist a thousand times and unscrew themselves very easily. I had to put the nut from other earrings on them. Otherwise, they are beautiful and of good quality and have a certificate, but this type of closure should be firm. The truth is that it has been quite disappointing because I bought them precisely because of the type of closure.