It's hard to find the right opening sentence every time, so I will just bump in with a picture:
I think black french manicures are something you whether hate or love. In my case, I hate it that I don't have the courage to wear it outside the house. Anyway, this black polish with tiny silver glitter that is used for the double french is: Essence Colour & Go no. 85 Galactic Black. In order to show you the tiny cosmic silver particles, here is a bottle picture:
As for the middle part of the nail, I used one coat of a milky white sheer polish: KIKO no. 204. Then stamped another design of BM225 with Catrice Back To Black. It's odd that Back To Black didn't work that well with BM plates compared to Konad image plates. That is way the design came out a bit subtle.
Have a great one!!!