These are treated blue diamond stud earrings. These earrings are brought to you by Diamond Jewel, an Amazon jewelry brand committed to making a wide array of styles and exact-size, exact-fit jewelry that all have diamonds set inside of them - all of Diamond Jewel's jewelry have a diamond in them. Our high quality jewelry offers only the industry’s highest quality diamonds with our experienced buying team working with our suppliers to select timeless styles and create well-crafted and comfortable jewelry. Our team of Gemologists inspect each and every piece for quality craftsmanship and every diamond for cut, color, and clarity to ensure your jewelry will sparkle for generations.