Classic Round Black Onyx Stud Earrings in 9ct White Gold 3.5mmClassic black onyx round stud earrings crafted from 9ct white gold. These earrings are simple and elegant and are suitable for everyday wear, they feature a four claw setting with a faceted round cut black onyx gemstone all set on a frame of hallmarked 9ct white gold. The earrings measure 3. 50mm in diameter These earrings have a post and butterfly clip and are suitable for pierced ears only Blue sapphire Information: Shape Cut: Round Stone Size: 3.