Start off with a purple base color.
Next either use a stripe polish or a fine art brush and black polish. Paint on the middle of the feather where you wish to put it. Then a circle to indicate where the details of the peacock feather will be.
Next start on the feathers. Start at the bottom and work up and around the circle.
Then take a dotting tool, or a tooth pick, and with orange start to create an egg shape in the circle with the tip of the egg towards the top.
Then with the same tool create a circle inside the orange with Green
Then with grey, create a half circle inside the green.
Now you can stop here and add a nice thick top coat. Or you can add some glitter, which is what I decided to do.
I randomly placed dots of glitter on my other nails. Then glitter throughout the feather.