Seijna . Diamond Stud Earrings: The Ultimate Must-Have Timeless and chic, natural diamond stud earrings elevate every style. A must-have, just like the little black dress! Diamonds are trendy! 10 designers who reinvent diamond jewellery We have selected for you 10 trendy jewellery brands that reinvent natural diamonds. Discover Messika, Akillis, Manipura, Karine Chedid and more.