Polish the nail gold.

Use opaque polishes and a striper brush to paint the colors of the rainbow in a fan shape from the top to about halfway down the nail.

Use black nail polish to paint a circle at the base of the rainbow and paint a horizontal line on top of the circle to create the pot.

Use green polish and a dotting tool to create shamrocks. Use a striper brush to add a curved line on the pot with white polish.

Apply top coat. Apply gold jewels or gems using extra top coat or nail glue.