Revlon Carbonite Nail Enamel ($2.00 - $4.99, 0.5 oz., Drugstores) is a smokey charcoal with silver, gold, and darker charcoal shimmer and a high metallic finish. It is a limited edition shade part of the Grit Grandeur collection. It reminds me of the look of furiously used pencil shavings.
The brush is well designed for the formula. It isn't too long or flimsy. It distributes the medium-thick formula very well for easy control and application. You could get away with two coats, but if you want super opacity, I'd apply three coats. Carbonite wore well for a few days before I saw tip wear (but no chipping).
I was super impressed by Carbonite's formula because I typically have terrible luck with Revlon polishes. This particular shade applied evenly and semi-opaque in one coat--unheard of for Revlon polishes! I love the smokiness, metallic finish, and multidimensional nuances. I wasn't able to locate any in my drugstores, but I did see one at Big Lots for $2.00!
The mentioned product(s) was/were purchased by me.