Ross-Simons - Black Diamond-Accented Single Flat-Back Stud Earring in Silver. RS Pure. Modern designs that complete your outfit and complement your personality. Enjoy a bold pop of color from this dainty black diamond-accented single stud earring. Crafted in sterling silver, this simple pushpin style features a flat back that won't poke or jab while you're taking a quick nap or getting a full night of beauty sleep. Insert the backing first into a pierced ear, then slide the front post inside to secure. Designed for 24/7 wear, this easy earring is ideal for an active lifestyle and can be worn without worry during workouts, travel and all of your daily activities. Suitable for cartilage piercings. Black diamond-accented single stud earring. Diamond birthstones are the perfect gift for April birthdays.