But maybe Justin needed to stretch a little more, so I hit the opposite end of the jewelry spectrum next: David Yurman, which carries diamond and precious-metal pieces. I was shown the newest collection by the boutique’s extremely helpful staff, including silver dog tags which hang on a thick, ropelike chain. The tags—encrusted with black-diamond DY logos—were well crafted and have a nice, heavy feel but were just too over-the-top for Justin, or anyone else not starring in a rap video this week. 729 Madison Ave., nr. 63rd St.; 212-752-4255.