Stacked CZ Pearl Flatback Stud Studs 9ct Gold 5mm Freshwater Button Pearl Studs in White Angus & Coote Stacked CZ Pearl Flatback Stud Studs Silver Pearl Button Studs The Black Tux. Payton Pearl Screwback Stud Discover your go to, waterproof staple with our micro screwback stud earrings. Meticulously crafted with premium surgical stainless steel materials, these micro studs epitomize fun and durability. Offering both style and security, their innovative screwback design ensures a snug fit for everyday wear. Perfect for adults and kids. Style Description: Simple 5mm pearl.