Trending Black Coffin Nail Ideas With Rhinestones : Rapper iggy azalea is sitting pretty with her unique version one of spring's coolest nail 13. Also called the coffin nail, the nails literally look like a home for the deceased—and should also get you some instagram comments like, omg dead. Black Coffin Nail Ideas With Rhinestones / These nails are a soft glitter ombre with a rhinestone.