Smooth as silk and full of color, these are made from Blue Mussel shells and each is more beautiful than the last. Soft indigo is the predominant color, with purples, creams, whites, and dark indigo.  7/8" to 15/16" diameter, most are slightly curved up at the edges, quite thick, with two holes about 2mm.  Lots of variance, as you can see from the photos. The fronts are completely smooth and have high shine. The backs are full of color also, almost as smooth, some more striped than others.  Radiant natural ocean-washed and tumbled, then worked by expert button artisans. They are so natural and so gorgeous.