Classic 925 Sterling Silver 5mm Diamond Round Brilliant Cut Cubic Zirconia (CZ) Stud Earrings. These stylish sterling silver 5mm round brilliant cut diamond CZ stud earrings are HOT. The white stone’s reflection of light creates a fiery effect within the gems. White cubic zirconia cz’s are manmade flawless stones that look just like diamonds. Only you will know the difference with these stunning stud earrings. The CZ measures 5mm and carries a total carat weight of approx. 1.5 carats. These 5mm cubic zirconias are the perfect size for a little bit of bling without appearing too gaudy. What better way to show how stylish you are!