Mom called my nails tacky, I had to explain it was St. Paddy's!
The green base coat, Ivy League (Sally Hansen), was opaque in 2 coats. The Gold and The Beautiful (Wet n Wild) was free-handed on the tip, because my attempts with tape were not successful. Luckily, the gold glitter in clear base does not highlight the imperfection.
The rainbow laid on top of Chow Chow (Risqué - Risqué ♥ Dogs collection) was an attempt at a dry marbling. I can't remember all the colours that were used, but it was a bunch of different brands. Which leads me to my lesson learned: use the same brand, so the colour expand equally and the layers of the marble are similar. Not perfect, but I was quite happy with the results!
And there's always a pot of gold at the end of (or under?) the rainbow. To reach full opacity, I used 3-4 coats of the gold glitter. The shamrock was a free-hand design with Ocean (Revlon) following a tutorial.