This item will be shipped by [page="merchant_info"]crystal diamond zirconia[/page] . Free returns within 15 days. For detailed information, click [page="return_conditions"][/page]. All jewelery is made of 925 sterling silver and is covered by a 2-year warranty against tarnishing. The products will be sent in their boxes with their certificates. The products are not "Jeweller's Diamonds". The products are not natural stones but are produced in a laboratory environment. The Products Are Laboratory Diamonds - They Are The Best Alternatives To Mine Diamonds