The Cusp Hoops in Gold by Laura Lombardi features: 

Domed hoop earrings composed from our signature hollow brass.

Raw brass, gold fill posts.

With brass items, please anticipate slight variation in colour and tone from the items photographed. Patina and oxidation of raw brass is natural, and may occur gradually over a long period of time or quickly with exposure to humidity, chemicals or cosmetics. To restore the original luster of your piece, gently wipe clean using a polishing cloth.