The 'Tian Tian Jian Bao Gradient Color Necklace' refers to a jewelry item, possibly from a Chinese auction or show where antiques and collectibles are appraised. The 'Gradient Color Necklace' suggests that the necklace has a design with colors that gradually shift or blend. This type of jewelry often has aesthetic and cultural value, and may be of interest to collectors or those interested in Chinese antiques.