As base I used three coats of Catrice So Suit! (FeMALE Limited Edition), a dark grey polish that dries to a semi-matte finish (ok, the matte finish is not visible, but worn alone without topcoat it's there). My glitter topper is Emily de Molly Rhodium, a clear base with lots of silver holo glitters in various sizes, mostltly hexes but also some squares. I used a genreous coat of KBShimmer Clearly On Top for a smooth finish.
Emily de Molly polishes are available on Etsy and at their own shop (Australia only) and at a lot of international stockists. Rhodium seems to be discontinued, I couldn't find it in the shops anymore.