Zena Jewelers 1138 Newpark Mall, Newark, CA94560 Zena Jewelers is a jewelry shop located in the Newpark Mall. This shop sells a selection of diamonds, rubies, sapphires…More and other stones. It also sells settings for engagement rings, bands, and necklaces. Zena Jewelers has the perfect item for a gift or for the holidays. Zena carries jewelry at all pricepoints, so customers are bound to find something from this store to enjoy.