Ok so this isn't really a dupe but more inspired by!
OPI Lucerne-tainly Look Marvelous from last years Swiss collection is a gorgeous gunmetal grey packed with shimmer. I have to admit this isn't my own bottle, it's my Mums hence no swatch as she has taken it back to her house and she lives abroad! I did borrow it while she was here and it looked stunning, very shimmery and clearly grey not black.
I also don't have Chanel's Graphite to show you a comparison as I went to buy it earlier this week and it was already sold out! I have seen the polish and person, it has more of a gold tone to it along with the silver, hence not a direct dupe. If it doesn't come back into stock I'll get my own bottle of Lucerne-tainly Look Marvelous!
Do you guys have either of these?