3.0 I like Helzberg's, but I don't like that they do not guarantee their products for almost any length of time Unless of course you fork out more for your lifetime guarantee. I bought my granddaughter an "H" necklace & lower than 3 months later on, the chain clasp broke. https://health-tips82457.tokka-blog.com/32040898/top-birth-stone-jewelry-secrets