The Cyrus Opal Stud Hoops are a unique twist on our popular classic opal styles. These earrings gently hug the ear and offer a subtle but sparkling touch to any ear stack.  Measurements: 6.5mm x 10.5mm Materials: - Gold Plate brass - Synthetic lab created Opal - Cubic Zirconia -Sterling silver post Plated jewelry is a process where a thin layer of gold or silver is bonded onto a base metal. This is a budget-friendly alternative to real gold and allows us to have a wide variety of on trend styles. Our product description will indicate whether the piece has a brass or sterling silver base. It is important to use proper care when wearing and storing these pieces to increase the lifespan of the plating.   Plating will eventually fade over time, but can be prolonged with proper care. Jewelry should be the last thing you put on and you should avoid any direct contact with perfumes, lotions, soaps or any other harsh products. Do not wear or wash them in soap and water.