Check out Gloria Lieberman's ANTIQUES ROADSHOW appraisal of this Tiffany & Co., this pearl necklace Tiffany Labellov. Click “I accept” to consent, or click “Manage Preferences” to. Condition: Condition requests can be obtained via email. Natural Pearl & Diamond Necklace, ca. Natural Pearl Necklaces from the world's finest dealers on 1stdibs.