3.0 I like Helzberg's, but I don't like that they don't warranty their products for almost any length of time Unless of course you pay further to the lifetime guarantee. I bought my granddaughter an "H" necklace & less than 3 months afterwards, the chain clasp broke. I'd read through https://socialclubfm.com/story9093885/dainty-gold-necklaces-options