NARS 47th Street is a neutral-toned, dark black with a glitter finish. It is a limited edition eyeliner that retails for $24.00 and contains 0.02 oz.
NARS 47th Street Larger Than Life Long-Wear Eyeliner ($28.00 for 0.16 oz.) is described as a "black with silver shimmer." It's a dark black with chunky silver sparkle--it's definitely larger than what you'd expect of shimmer. I couldn't think of anything similar to this (not to say that there aren't dupes, just nothing I know of). The closest that I could come up with was MAC Black Swan, which is black with more of a blue shimmer-sheen. MAC Smooth Manoeuvre is also black with a couple of bits of silver shimmer but hardly any. Update: A few readers suggested Urban Decay Oil Slick, which is a silver-shimmered black, and it is a softer, lighter black (almost looks gray in comparison), and the sparkle is a lot subtler/smaller, so it's not quite the same, but it is similar!
Larger Than Life Long-Wear Eyeliner takes liner to the next level. Rich, creamy color that glides on smoothly with a completely new Smudgeproof finish. Incomparable 12-hour wear with no smearing and no caking. Deeply dramatic shades named for the most iconic streets in the world.