Payment Card Industry (PCI for short) Compliance standards were enacted in June 2003 by the major credit card companies to minimize identity theft.
The standard says that you as a merchant need to protect all personal information and ensure security when transactions are processed using a payment card. Your financial institution will impose a non-compliance fee if you don't submit them the required proof of compliance.
If your jewelry website accepts credit cards you must maintain proof of compliance. PCI Compliance is in your own best interest because non compliant websites are susceptible to hacking. You will be fined and loose the ability to process credit cards if someone's identity is stolen as a result of your website being hacked.