18ct White Gold Blue John Bloom Four Leaf Clover Ball Edge Stud Earrings. Perfect for adding a touch of sophistication to any outfit, these 18ct white gold earrings feature a unique design of a four leaf clover with a Blue John bloom centre. The ball edge detailing adds a modern touch to these classic stud earrings. Enhance your jewellery collection with these exquisite earrings that are sure to make a statement.