customized silver rings

Where can is a good place to customize my own piece of jewelry?

I had a ring in Sterling silver purchased in Mexico, had 3 large pink opal star in the middle, unfortunately, missed some time ago and I have no idea where to get one if you have a website or a store that can make please tell me

you may request the assistance of the local jewelry store or online. Describe your ring clearly and they can do for you this week

Cat Ring, Silver Cat Ring With Gem Stone.