<br><p>1. These stud earrings set are made of copper, all of them passed the precious metal test. Economical jewelry set for men and women.</P> <p>Never outmoded design, diamond earrings is elegant and stylish, you will never regret for this choice.</p> <p>The earrings skin test grants allergy free, nickel-free and lead-free, wear it rest assured.</p> <br><p>TIPS:</p> <p>1.Rub your earrings with baby wipes: they perform miracles on jewelry. </p> <p>2.Then rub with a clean dry soft cotton cloth to bring back the shine.</p> <p>3.Put it inside a soft cloth pocket or fabric swath, avoid it from rubbing against other jewelry. </p> <p>4.To better maintain your earrings, please take it off when you swim, take a shower, or other action involved in water.</p></br> <br><p>About Cubic Zirconia</p> Cubic Zirconia is a stone so optically close to diamond that most jewelers cannot tell the difference between a CZ and a diamond with the naked eye. The man-made stone is virtually flawless whereas most diamonds have internal inclusions or external blemishes. It is a high quality synthetic gemstone which imitates the appearance of diamonds. Cubic zirconia is zirconium oxide (ZrO2), a mineral that is extremely rare in nature. Synthesized CZ is much less expensive than diamond, optically flawless and can be created in a variety of different colors.</br>