.62 Art Deco Diamond Onyx Drop Earrings in Platinum. These stunning Art Deco drop earrings feature black onyx and .62 carats of diamonds in platinum. The square onyx pendants are set in four prongs below a stunning display of Art Deco craftsmanship. Geometric towers create the body of the earrings, holding a collection of marquise and single cut diamonds. Dimensional and shimmering, these earrings are finished on classic fish hook backings and would make a fabulous accessory for a Little Black Dress!