Gem Tech Jewelry Address: 3500 West 6th Street, Los Angeles, CA 90020Phone: (213) 380-5353 (3 votes, average: 2.00 out of 5)Loading... This is the “Gem Tech Diamond” at the City Center mall on 6th Street. Wedding rings, necklaces… Asurion Tech SolutionsRubrum Handcrafted JewelryVendome Jewelry Posted in RETAIL STORES and tagged City Center, Korean.