Corbo Jewelers. They have chains all over the place. My dad's gf worked at the one in Clifton and now works down in Old Bridge. There stuff is reasonably priced and they have wonderful customer service. I also get discounts through her (the cost of our wedding rings cost less than what mine would have been on its own, and the jewelry gift I gave my bridesmaids were nearly 25% off each, plus my jewelry was nearly 30% or more off). But even without the discounts its pretty reasonable.
They have a website...
www.corbojewelers.com so you can possibly find either stores more local.