Rocks Gold Collection 9ct White Gold, Rose Gold & Yellow Gold Stud Earrings With A Double Knot Shape. Add these beautiful and elegant knot stud earrings to your jewellery collection and wear them alone or with other pieces to create a unique layering look. Find additional hoop or stud earrings in our 'Rocks Gold' Collection & create a unique layered ear style. Size: 7mm Approx