1 piece includes a matching box. If your Moissanite jewelry is over 0.3 carats, a certificate of stone properties is provided. Our limited warranty is included - for any issues related to your purchase, please contact us. Made with 925 sterling silver, the Moissanite Carat weight is 3. Take care to avoid wearing during exercise, as sweat can cause a reaction with the jewelry that leads to deterioration and corrosion over time.