CDI Diamonds & Jewelry is family owned and operated by Matt Carlozzi Jr. with his son Matt III since 2001 as the former Bernie Helmick Diamonds and Gold. CDI provides a customer experience based on education, selection, expertise and a no pressure approach. We take every effort to stay ahead of the curve on both style and technology. Our diamond viewer allows our customers to view their diamond on a large HD screen instead of a microscope or jewelers loop. CDI offers one of Columbusâ€™s most affordable selection of engagement rings. We carry bridal jewelry lines from the following designers Carrizza, Romance, Mars, and CDI exclusive collection of wedding bands. Also, CDI has a large inventory of diamonds to meet any budget or style. Our fashion jewelry line includes Lafonn and Elle along with the CDI Diamond Fashion Collection. CDI provides our customers with the additional following services jewelry repair appraisals, and financing.