Here is a nose stud mae of solid 14-karat gold, an exclusive piece of jewelry for your nose piercing. 

The difference between this and nose screws is the shape of the bar that goes inside the nostril. Nose screws have a curved end that can be a challenge for some people, as they have to be twisted once inserted into the nose piercing.

However, nose studs have a rounded end, slightly thicker than the bar, which holds the stud in place. Without it, the stud would slip out of the piercing. 

As mentioned before, this piece is made of 14-karat gold. Gold doesn't release nickel particles and doesn't discolor the skin, as happens with silver. Thus, you mustn't worry about stains on your skin when you use this nose stud.