It doesn't seem to be particularly concentrated, but large shopping malls generally have counters, such as Ginza, He Jiong and Hualian. There are generally more than a dozen brands, such as Chow Tai Fook, Luk Fook Jewelry and Golden Supreme, which deal in all kinds of jewelry. Specialized stores, such as Qilu Jindian and Sunjindian, are more formal and have many choices.