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The skilled and friendly staff of Costello Jewelry Company happily extends, in both of their palatial Glen Ellyn and Naperville, Illinois, jewelry stores, comprehensive and on-site fine jewelry services that include, in-house jewelry repairs, watch repairs, pearl restringing, and engraving, as well as appraisal and full-service custom bridal and fashion jewelry design services. In addition to offering next-level customer service, available today in both the Glen Ellyn and Naperville, Illinois, locations of Costello Jewelry Company is an unbeatable selection of top-quality engagement rings, wedding bands, loose diamonds, Swiss-made timepieces, as well as an array of fine fashion jewelry items.