Tiny abstractly cut geometric shape studs in a marbled clay (grayish with hints of pink, teal, brown, white, and black) with gold or silver luster dip along one tip each. Surgical Steel (hypoallergenic) posts. Nickel-free. ** Please note there is a lot of variation in the marble pattern and each piece looks significantly different, but all fall in a gray tone, some lighter some darker, some more blended some with visible lines and patterns. Each piece is cut by hand in a unique geometric shape, similar but not identical to the photo. These are a pair, but not twins, they will have some variation in size and shape.