Classic Round Ruby Stud Earrings in 9ct Yellow Gold 3.5mmAbout This Item Classic round cut ruby stud earrings crafted from polished 9ct yellow gold. These rich red earrings measure 3. 5mm, making them perfect for everyday wear. Earrings are suitable for pierced ears and feature a butterfly clip. Gemstone Information Rich red ruby is one of the four gemstones considered precious. Historically, ruby was worn as a protective talisman as it was believed that it could offer protection from bad luck and ill