Three.0 I like Helzberg's, but I don't like that they do not warranty their products for just about any length of your time Unless of course you spend extra for your lifetime guarantee. I purchased my granddaughter an "H" necklace & below three months later on, the chain clasp broke. https://griffinandzp.blogocial.com/examine-this-report-on-initial-necklaces-diamond-67734882