With the 18K Gold Top Coat I tried to create a Lapis Lazuli effect on the nails.
Lapis Lazuli Inspiration
I used Motcomb Street by Nails inc. London as my base navy colour and put a coat of Pearly Malachite Green (shade 300) by Kiko to add more sheen and lighten the blue. On my ring finger I used Cabaret by Gina Tricot in order to get a purple Amethyst colour (subtle birth stone idea with the birthday around the corner).
Then the 18 K Gold top coat by OPI Sephora on top of all of the nails.