one way would be foils. Would be time consuming with regular polish as you'd need to wait for the polish to be dry before applying the foil adhesive. With gel polish you'd need to do the 2 color coats, cure wipe off sticky, paint on the tip with topcoat, cure, and use the sticky layer as the foil adhesive, but make sure the foil works with gel polish. Some will not work well because they don't come off easy and the gel's sticky layer isn't enough to pull them from the plastic film. But the effect is a very nice metallic effect.
Another way is a very well pigmented metallic color coat which is what the picture looks like.